上海市嘉定区2020届高三下学期质量调研测试英语试题

上海市嘉定区2020届高三下学期质量调研测试英语试题

‎ 2020上海嘉定区高三英语二模试卷 I. Listening Comprehension Section A Directions: In Section A, you will hear ten short conversations between two speakers. At the end of each conversation, a question will be asked about what was said. The conversations and the questions will be spoken only once. After you hear a conversation and the question about it, read the four possible answers on your paper, and decide which one is the best answer to the question you have heard.‎ ‎1.A. Customer and salesperson.‎ B. Teacher and student.‎ D. Guest and waitress. ‎ C. Boss and secretary.‎ ‎2. A. The program was not interesting enough.‎ B. She didn't want to listen to the program.‎ C. She had to meet her students.‎ D. The students' questions kept her busy.‎ ‎3. A. Help the man with his essay.‎ B. Memorize her lines by herself.‎ C. Wait until the man finishes his essay.‎ D. Ask Sue to help her.‎ D. Shopping for running shoes ‎4. A. Practice her presentation in front of him.‎ B. Find out who her audience will be.‎ C. Try not to think about her audience.‎ ‎5. A. Writing a term paper.‎ B. Studying for a history test.‎ C. Reading a magazine.‎ D. Watch him make his presentation.‎ ‎6. A. He doesn't like the way Americans speak.‎ B. He speaks English as if he were a native speaker.‎ C. He doesn't mind speaking English with an accent.‎ D. His English is still poor after ten years in America.‎ ‎7. A. The box office is closed today.‎ B. The tickets have been sold out.‎ C. He doesn't want to go to the concert.‎ D. It's too late to buy the morning paper.‎ ‎8. A. He received a good evaluation.‎ B. He enjoyed a wonderful performance. ‎ C. He's getting along well with his supervisor.‎ D. He gave a good performance in the evaluation.‎ ‎9. A. The library is closed on weekends.‎ B. He had no idea where the book was.‎ C. He wasn't allowed to check out the book.‎ D. He didn't get the book he needed.‎ ‎10. A. He can't hear Tom clearly.‎ B. Tom's speech is too deep.‎ C. Tom doesn't speak directly.‎ D. Tom doesn't talk about the proposal.‎ Section B Directions: In Section B, you will hear two short passages and one longer conversation, and you will be asked several questions on each of the passages and the conversation. The passages and the conversation will be read twice, but the questions will be spoken only once. When you hear a question, read the four possible answers on your paper and decide which one would be the best answer to the question you have heard.‎ Questions 11 through 13 are based on the following passage.‎ ‎11. A. He wrote the Superman stories.‎ B. He was the best American journalist C. He was the boss of many newspapers.‎ D. He won prizes for press photography.‎ ‎12. A. It stood up for the common people.‎ B. It made public the wrongdoing of officials.‎ C. It established a famous prize for journalism.‎ D. It probably provided a model for the Daily Planet ‎13. A. Model newspaper.‎ B. Excellence in journalism.‎ D. Best school of journalism in America.‎ C. Impressive public opinions.‎ Questions 14 through 16 are based on the following passage.‎ ‎14. A. The fondness for the Ambassador. ‎ B. The long history of the Ambassador.‎ C. The brilliant functions of the Ambassador.‎ D. The stop of the production of the Ambassador.‎ ‎15. A. Low demand and lack of money.‎ B. High price and strong competition.‎ C. Lack of buyers and poor economy.‎ D. Few changes and less competitiveness.‎ ‎16. A. Because the car can operate with ease.‎ B. Because the car has a strong steel body.‎ C. Because the car has a very long history.‎ D. Because the car can be fixed at a low cost.‎ Questions 17 through 20 are based on the following conversation.‎ ‎17. A. Whether high-quality students can explain concepts clearly.‎ B. Whether schools should adopt gifted education programs.‎ C. Whether regular students can benefit from gifted ones.‎ D. Whether parents can do something for the smart kids ‎18. A. They will feel superior to their peers.‎ B. They will focus on assisting their teachers.‎ C. They will get motivated and reach their full potential.‎ D. They will lose the chance to tutor their struggling peers.‎ ‎19. A. Gifted education programs are beneficial to some schools here.‎ B. Both slower and advanced learners should receive special education.‎ C. Regular classes discourage bright students' motivation due to boredom.‎ D. Gifted programs rob average students of the chance to learn from bright ones.‎ ‎20. A. He has prejudice against regular students.‎ B. He has preference for bright students.‎ C. He is enthusiastic about gifted programs.‎ D. He lacks understanding of gifted students Ⅱ. Grammar and Vocabulary ‎ Section A Directions: After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper from of the given word; for the other blanks, use one word that best fits each blank. ‎ Long-term low self-esteem can cause depression Low self-esteem makes us feel bad about ourselves. But did you know that over time it also can cause the development of serious mental conditions such as depression?‎ Self-esteem is, very simply, he set of feelings you have about yourself. It’s developed by your experiences, thoughts, feelings, and relationships. (21) ________ self-knowledge, which refers to how much you know about yourself, self-esteem is formed around whether you like yourself or not. Depression is much more than just feeling sad. It drains your energy and makes everyday activities difficult. ‎ Doctors use low self-esteem as one possible symptom (22) ________ they diagnose the mental condition of major depressive disorder. They don’t necessarily care (23) ________ low self-esteem causes the depression or vice versa. However, personality researchers have long wondered about the chicken-and-egg problem of self-esteem and depression. Certainly, if you dislike yourself, you’ll be more likely (24) ________ (depress). On the other hand, if you’re depressed, you’ll be more likely to feel bad about yourself. The only way that (25) ________ (employ) to explore the highly related concepts of self-esteem and depression is through continuous research, (26) ________ ________ people are followed up over time. ‎ A study on depression conducted by University of Basel researchers Julia Sowislo and Ulrich Orth, (27) ________ (contrast) the competing directions of self-esteem to depression vs depression to self-esteem. The findings have revealed that over time low self-esteem is a risk factor for depression, regardless of who is tested and how. The study indicates that low self-esteem causes depression (28) ________ not vice versa. ‎ Therefore, if a person has low self-esteem, there’s a (29) ________ (great) risk of developing depression. This is a very important discovery because it shows that (30) ________ (improve) a person’s self-esteem can make him or her feel better. ‎ Section B Directions: Fill in each blank with a proper word chosen from the box. Each word can be used only once. Note that there is one word more than you need. ‎ A. exposed B. interacting C. implement D. deliberately E. vision F. balance ‎ G. essentially H. extreme I.‎ evolution J. engaged K. impacting ‎ Put down the phone and live in the moment Have you ever unintentionally left your phone at home and wondered how you would get through the day? Baylor College of Medicine’s Dr. Jin Han explains why this might be a sign that you need to put down your phone more often. ‎ ‎“There has been a(n) __31__ in technology as our phones have gone from just regular cell phones to smart phones that allow you to multitask all with one device,” said Han, assistant professor at Baylor. “You use your phone now to receive emails, to text and chat and to access social media platforms -- __32__ your phone may be your connection to your social life.”‎ Although they offer many advantages, Han cautions that using your smart devices can be harmful if you use them too much. For example, using your smart phone while driving, or even walking, can cause serious accidents. Also, staring at your screen for too long can be harmful to your __33__. ‎ Being __34__ too long to your phone also can impact the quality of your relationships, he said. If you are on your phone constantly and not __35__ with those around you, it can take away from your relationships with your family and friends. In addition, if you are using your phone too much in front your children, then they will likely follow your lead and use their own smart devices ‎ rather than __36__ with you. ‎ ‎“ In the end, the question is how you balance using your phone while not negatively __37__ your health.” Han said. “Anything that you are doing to the __38__ is no healthy anymore. While it is going to be almost impossible not to use this technology, we have t create a behavior that is healthy.”‎ To help __39__ the time you spend on your phone, Han offered the following tips: ‎ l Limit the time spent on your phone: Set up certain time that you allow yourself to be on the phone. ‎ l Do not use your phone at night: Being on your phone late into the night can make it harder for you to fall asleep and wake up the next day. Restricting your phone use at night can help you __40__ a healthy sleep behavior. ‎ Ⅲ. Reading Comprehension ‎ Section A Directions: For each blank in the following passage there are four words or phrases marked A, B, C and D. Fill in each blank with the word or phrase that best fits the context. ‎ The scent of coffee appears to enhance performance in math Drinking coffee has benefits. __41__ the physical improvement, coffee may reduce our risk of heart disease. Coffee may even help us live longer. Now, research also reveals that the scent（气味）of coffee may help people perform better on the analytical portion of the Graduate Management Aptitude Test, or GMAT, a computer adaptive test __42__ by many business schools. ‎ The work, led by famous professor Adriana Madzharov, not only __43__ the hidden force of scent and the cognitive（认知）improvement it may provide on analytical tasks, but also expectation that students will perform better on those tasks. Madzharov, with his colleagues, recently published their findings. ‎ ‎“It’s not just that the coffee-like scent helped people perform better on analytical tasks, which was already __44__,” says Madzharov. “But they also thought they would do better, and we demonstraded that this expectation was at least partly __45__ their improved performance.” ___46___, smelling a coffee - like scent, which has no caffeine in it, has an effect similar to that of ‎ drinking coffee, suggesting a placebo（安慰剂）effect of coffee scent. ‎ Madzharov’s team tested 100 undergraduate business students, divided into two groups, with GMAT algebra questions. One group took the test in the __47__ of a coffee - like scent, while a control group took the same test - but in an unscented room. They found that the group in the coffee-smelling room scored significantly higher on the test. ‎ Madzharov’s team wanted to know more. Could the first group’s performance in quick thinking be explained, in part, by an expectation that a coffee scent would increase __48__ and consequently improve performance?‎ The team designed a follow-up survey, conducted among more than 200 new participants, quizzing them on __49__ about various scents and their effects on human performance. Participants believed that they would feel more alert and energetic in the presence of a coffee scent, in contrast with a flower scent or no scent; and that __50__ to coffee scent would increase their performance on mental tasks. The results suggest that __51__ about performance can be explained by beliefs that coffee scent alone makes people more alert and energetic. ‎ Madzharov is now looking to explore whether coffee-like scents can have a(n) __52__ placebo effect on other types of performance, such as verbal reasoning. She also says that the finding - that coffee - like scent acts as a placebo for analytical reasoning performance - has many practical __53__, including several for business. ‎ ‎“Sense of smelling is one of our most powerful senses,” says Madzharov. “Employers, architects, building developers, retail space managers and others, can use scents to help __54__ employees’ or occupants’ experience with their environment. It’s an area of great interest and __55__.”‎ ‎41. A. In contrast to B. Contrary to C. In addition to D. Equivalent to ‎ ‎42. A. acquired B. required C. justified D. inquired ‎ ‎43. A. distributes B. stimulates C. dominates D. highlights ‎ ‎44. A. encouraging B. imposing C. conflicting D. challenging ‎ ‎45. A. characterized by B. called for C. responsible for D. typical of ‎ ‎46. A. In short B. By comparison C. In particular D. After all ‎ ‎47. A. lack B., shift C. withdrawal D. presence ‎48. A. comprehension B. alertness C. conscience D. context ‎ ‎49. A. evidence B. definition C. symptom D. belief ‎ ‎50. A. adaptation B. commitment C. exposure D. alternative ‎ ‎51. A. implication B. expectation C. indication D. illustration ‎52. A. similar B. concrete C. modified D. estimated ‎ ‎53. A. simplification B. description C. resignation D. application ‎ ‎54. A. enhance B. evaluate C. exploit D. prospect ‎ ‎55. A. negotiation B. priority C. potential D. strategy ‎ Section B Directions: Read the following three passage. Each passage is followed by several questions or unfinished statements. For each of them there are four choices marked A, B, C and D. Choose the one that fits best according to the information given in the passage you have just read. ‎ ‎(A)‎ People generally see themselves through achievements. In doing that, they end up caring more about their image than the reality of who they actually are. Rather than their work doing the talking, they end up defining themselves by external markers that they hope will earn them respect. ‎ The problem with this is that it encourages both themselves and other people to judge their worth based on some relatively unimportant measure. For example, one day, their educational diploma may overshadow what they actually learned. Therefore, a better way to know a person, I think, is to ask a different set of questions: What motivates them? What makes them ache? What do they long for?‎ It’s in this spirit that I want to publicly share my values. They are the compass（罗盘）that guides my life. The kindest and most sincere thing I can do is to see, recognize, and understand another person before I make judgments. From there, I can learn to treat others appropriately, depending on the context, learning from my mistakes with time and experience. It’s just a reminder that life is hard for all of us, while at the same time accepting that it’s important we are all also held accountable for our actions. ‎ I have learned that we are all deeply self-interested. I hope to be self-aware enough to check out of the power and status games. That means I’m not competing with anyone for a shiny object;‎ ‎ I’d rather compete with myself. It’s about becoming so uniquely different that it would be an insult for me to measure myself against someone else. I believe if I do the work to be internally free from the pull of the power and status games, then I can add value to others bused on my unique knowledge and experience. ‎ If this resonates with（与……共鸣）you, I invite you to join me on this journey in understanding and relating to this complex world. It’s a wonderful mystery, and I think together we can better define it -- not just personally, but also collectively. ‎ ‎56. According to the article, which of the following is TRUE?‎ A. The external markers are better ways to know a person. ‎ B. People generally judge others’ worth by what they have achieved. ‎ C. The author is someone who is keen on power games. ‎ D. Learning from mistakes is the first step of treating others kindly. ‎ ‎57. What does the underlined word “overshadow” probably mean?‎ A. be relatively similar to B. cause something to be stronger than ‎ C. make something less important D. block off light from something ‎ ‎58. What of the following might the author agree with?‎ A. Life is hard, so we shouldn’t criticize others when they are not responsible. ‎ B. One should overcome self-interest in order to judge others objectively. ‎ C. Everyone is unique, so showing off uniqueness is an insult to others. ‎ D. One should see and understand another person using a real compass. ‎ ‎59. Why does the author write the article?‎ A. To promote harmonious living. B. To ask people not to judge others. ‎ C. To call on readers to learn his values. D. To share his values of understanding the world. ‎ ‎(B)‎ The Elementary Science Fair Planning Guide The most helpful, scientific, kid-friendly science Fair project planner known to kids A Model, Display or Collection:‎ Shows how something works in the real world, but doesn’t really test anything. ‎ Examples of display or collection projects can be: “The Solar System,” “Types of Dinosaurs,” ‎ ‎“My Coin Collection.”‎ Examples of models might be: “How a Tornado Forms” or “How an Electric Motor Works”. ‎ An Experiment: ‎ Lots of information is given, but it also has a project that shows testing being done and the gathering of data. ‎ Examples of experiments can be: “The Effects of Detergent（洗衣粉）on the Growth of Plants” or “Which Paper Towel is more Absorbent”. ‎ You can tell you have an experiment if you are testing something several times and changing a variable（变量）to see what will happen. ‎ Even though you can learn a lot from building a model or display, we recommend that you do an experiment! Why? Well, they are fun, they are more interesting and most of all, they take you through the SCIENTIFIC METHOD, which is the way real scientists investigate in real science labs. Besides that, the scientific method is what the judges are looking for!‎ ‎60. Which of the following science projects might be recommended by the guide?‎ A. How swallows build their nests. ‎ B. What the solar system consists of. ‎ C. The three dances bees use to communicate. ‎ D. What structure can hold the most amount of weight. ‎ ‎61. According to the guide, which of the following is TRUE?‎ A. A model or a display is a great choice for the science fair. ‎ B. A hypothesis goes before a Question in doing an experiment. ‎ C. What tells an experiment from a model is whether to test something. ‎ D. The judges will instruct the scientific method before the science fair. ‎ ‎62. Who will be most interested in reading this guide?‎ A. Undergraduate students. B. Parents who have young kids. ‎ C. Staff working in the science labs. D. Judges invited to a science fair. ‎ ‎(C)‎ Getting active in midlife could be as good for you as starting young when it comes to reducing the risk of an early death, researchers have suggested. But experts say the study also ‎ shows that the benefits fade once exercise declines. ‎ ‎“If you maintain an active lifestyle or participate in some sort of exercise from youth to middle age, you can reduce your risk for dying,” said Dr. Pedro Saint-Maurice, the lead author of the research. “If you are not active and you get to your 40s - 50s and you decide to become active, you can still enjoy a lot of those benefits.”‎ The study was based on data from more than 300,000 Americans aged 50 - 71 who undertook a questionnaire（问卷）in the late-1990s. They were asked to recall the extent of their moderate to vigorous leisure exercise at different stages of their life. Researchers then used national records to track who died in the years up to the end of 2016. After taking into account factors including age, sex, smoking and diet, the team found that those who were exercising into middle age had a lower risk of death than those who had never carried out any leisure exercise. However, when the team looked at different patterns in the way people were active over their life, it found a surprise. ‎ Men and women who started exercising at the age of 40 - 50 reduced their risk of death from any cause by about 35%. The benefit was similar to that seen for people who reached and maintained similar activity from their teens or 20s onwards. ‎ However, the study found that the protective effect of exercise did not last forever. People whose levels of leisure exercise decreased by middle age had no difference in the risk of an early death to those who had always been couch potatoes. “If you have been active and you slowly decrease your exercise participation as you age, you lose a lot of the benefits that we know are associated with exercise,” Saint - Maurice said. ‎ But the study has limitations, including that it is based on individuals recalling how active they were many years before. What’s more, the research looked only at death records, not other aspects of health such as levels of sickness and disease. Nonetheless, he said, the message was positive. “This adds to the growing body of evidence about the importance of physical activity and exercise across he life course, and indicates that it is never too late to start.”‎ ‎63. Which of the following is TRUE about the study?‎ A. The study took about two decades to complete. ‎ B. The study involved around 30,000 elderly Americans. ‎ C. Questionnaires and interviews were the sources of data. ‎ D. The participants in the study took regular physical exercise. ‎ ‎64. According to the passage, what does “a surprise” (Para.3) refer to?‎ A. The earlier you exercise, the greater your health benefits will be. ‎ B. Participating in exercise from youth to middle age benefits one’s health greatly. ‎ C. The benefit of getting active in midlife is similar to that of starting young. ‎ D. The benefits of exercising in midlife will decline once you stop exercising. ‎ ‎65. It can be inferred from the passage that _________. ‎ A. an active lifestyle will not necessarily bring positive health benefits. ‎ B. participants’ memories may affect the reliability of the study result C. people exercising from their teens can maintain health forever ‎ D. women benefit more from vigorous exercise than men do ‎66. Which of the following might be the best title of the passage?‎ A. Exercise has its limitations, studies show B. Getting active when young, experts suggest ‎ C. Health benefits fade with age, doctors warn ‎ D. Never too old to start, researchers say ‎ Section C Directions: Read the following passage. Fill in each blank with a proper sentence given in the box. Each sentence can be used only once. Note that there are two more sentences than you need. ‎ A. As animals learn to relax in the presence of humans, they may become bolder in other situations. ‎ B. This massive amount of ecotourism can be one of the drivers of rapid environmental change. ‎ C. The phenomena result from evolutionary changes, but also from regular interactions with humans. ‎ D. Do not import or release living animals or plants into the wild that could harm native species. ‎ E. In many cases it involves close interaction with wildlife. ‎ F. Interacting with people can cause great change in the characteristics of various species over time. ‎ Ecotourism can put wild animals at risk Ecotourism has become increasingly popular in recent years. _____67_____ There travelers ‎ visit natural environments to fund conservation efforts or promote local economies. ‎ Now, scientists have analyzed more than 100 research studies on how ecotourism affects wild animals. They find the presence of humans changes the way animals behave, and those changes may put them at risk. Therefore, they concluded that such trips can be harmful to the animals. ‎ When animals interact in seemingly kind ways with humans, they may let down their guard. _____68_____. If this transfers to their interactions with predators（捕食者）, they are more likely to be injured or killed. ‎ The presence of humans can also discourage natural predators. It creates a kind of safe place for smaller animals that may make them bolder. For example, in Grand Teton National Park, elk and pronghorns in areas with more tourists are less alert and spend more time eating. ‎ ‎____69____ “If animals become accustomed to tourists and if tourism practices enhance this taming, we might create unintended consequences - affecting the behavior or population of a species and influencing the species’ function in its community,” the researchers write. ‎ Ecotourism has effects similar to those of animal domestication and urbanization. Research has shown that domesticated silver foxes become more obedient and less fearful. Fox squirrels and birds that live in urbanized areas are slower to flee from danger. _____70_____‎ Scientists hope the new analysis will encourage more research into the interactions between people and wildlife. It is essential to develop further understanding of how various species in various situations respond to human interaction and under what conditions human exposure may place them at risk. ‎ Ⅳ. Summary Writing ‎ Directions: Read the following passage. Summarize the main idea and the main point(s) of the passage in no more than 60 words. Use your own words as far as possible. ‎ ‎71. High level of deforestation continues ‎ We are all aware of the threats our planet is facing. Experts agree that it’s mainly us humans who are responsible for the destruction of the environment. One of the most destructive activities we are carrying out is cutting down forests - deforestation. This is done for many reasons, such as providing wood for fuel, making land available for housing or for crating space for more cattle to graze（吃草）on. This has been most noticeable in Brazil, which is home to the world’s largest ‎ rainforest. Deforestation there has hit its highest rate in a decade, according to official data. Over the course of a year, an area about five times the size of London has been destroyed. ‎ The amount of deforestation in the Amazon and in other tropical（热带的）regions has actually seen a decline but the figures are still large. Global Forest Watch say that in 2018, an area equivalent to 30 football fields were cut down every minute. Frances Seymour from the World Resources Institute says that “If you look back over the last 18 years, it is clear that the overall trend is still upwards. We are nowhere near winning this battle.”‎ What’s special about places like the Amazon is that they are primary forests which exist in their original condition with some species of trees dating back thousands of years. This habitat is home to unique and rare animals and is critical for sustaining biodiversity（生物多样性）. The BBC’s environment correspondent, Matt McGrath, says “These old forests really matter as stores of carbon dioxide, which is way the loss of 3.6 million hectares in 2018 is concerning.”‎ Brazil has taken some steps to try and decrease deforestation by introducing government policies including fines for breaking land use regulations and illegal logging. And International campaigns to stop the trade of soy and beef farmed on deforested parts of the Amazon have also had a significant impact. ‎ Ⅴ. Translation ‎ Directions: Translate the following sentences into English, using the words given in the brackets. ‎ ‎72. 应该高度重视对这种常见病的预防。(importance)‎ ‎73. 我们看似正常的行为也许会冒犯其他地方的人。(seem)‎ ‎74. 在科学家和医护人员共同努力下，治疗方法日趋完善，感染病毒的人数大幅下降。(so that)‎ ‎75. 短短两周，300多节精心设计的网课如期上线，并大受赞誉，这使他确信互联网将加速教学改革。(convince)‎ Ⅵ. Guided Writing ‎ Directions: Write an English composition in 120 - 150 words according to the instructions given below in Chinese. ‎ 同学们经历了十多年的课堂教学，也体验了两个多月的新型线上教学模式。两种教学模式各有特点。请表明你更偏爱哪种教学模式，并通过比较，阐述你偏爱的理由。‎ 嘉定区2019学年第二学期高三英语教学质量检测试卷 参考答案 Listening:‎ ‎1-5:CDDAB 6-10:CBADC 11-13:CCB 14-16:DAD 17-20:BCDC Grammar:‎ ‎21.Unlike ‎22.when ‎23.whether ‎24.to be depressed ‎25.is employed ‎26.in which ‎27.contrasted ‎28.but ‎29.greater ‎30.improving Vocabulary:31-35:IGEAJ 36-40：BKHFC Cloze:41—45：CBDAC 46-50:ADBDC 51-55:BADAC Reading comprehension:‎ ‎56-59:BCBD ‎60-62：DCB ‎63-66:ACBD Reading6选4：67-70：EAFC Summary writing:‎ ‎1.The most serious environmental destruction from humans is deforestation,which is most severe in Brazil.‎ ‎2.Although declining in tropical regions,the figures of deforestation are still large and the trend is continuing.‎ ‎3.Primary forests are important because of biodiversity and carbon dioxide storage.‎ ‎4.Brazil has taken measures to decrease deforestation and international campaigns have also joined in the effort.‎ The most serious environmental destruction from humans is deforestation,which is most severe in Brazil.Although declining in tropical regions,the figures of deforestation are still large and the trend is continuing.Primary forests are important because of biodiversity and carbon dioxide storage. Brazil has taken measures to decrease deforestation and international campaigns have also joined in the effort.‎ ‎(59 words)‎ Translation:‎ ‎72.Great importance should be attached to the prevention of this common disease.‎ ‎73.A behavior that seems normal to us is likely to/may offend people elsewhere.‎ What seems to be a normal behavior may offend people elsewhere.‎ ‎74.With the joint efforts/Thanks to the combined efforts of scientists and medical staff,treatment methods have (been) increasingly improved so that the number of people(who were) infected with the virus has greatly decreased/has dropped significantly.‎ ‎75.In just two weeks/ within two weeks,more than 300 well-designed online courses were launched on schedule and have received great praise,which has convinced/ convinces him that the Internet will speed up the teaching reform.‎ VI.Guided writing(略）‎