高中英语选择性必修三 Unit 3 Period 5 Using language(2) 课时练习（原卷版）

1、Unit3 Period 5 Using language（2）课时练习姓名：_学号：_得分：_限时：45分I:单词填空。（每个1分，共10分）The transport system cant cope with the v_ of passengers.(容量)Last week the operation r_ his eyesight.(恢复视力)3. Engineers carried out a thorough i_ of the water pump. (检查)4. The company was_ 20，000 for getting involved in illegal

2、trade. （罚款）5. Whatever you do will have a great i_（对有影响）society， so behave well. 6. The new edition of the dictionary with new idioms will _later this month，as you anticipate.(出版)7. The massive increase in spending failed to s_(维持)his life when he became seriously ill. 8. He isnt a silent boy. On th

3、e contrary，he f_（频繁）asks questions about the Internet.9. She b_good news to（向传播这个好消息） all her friends. 10. S_the good chance or you will regret it. (抓住)II:根据汉语意思用恰当的结构完成句子。（每个2分，共10分）1. Smoking _ his early death. There had been a prior case. (导致)2. I was nearly frozen _.寒风吹得我几乎冻僵了3. _，he hurried to

4、the mall. 所有工作都做完了，他匆忙去了商场。4. Your monthly budget must_ the company on the first day of each month. （提交）5. Ever since our secretary walked out，the office has been _(混乱)III.阅读理解。（每个2.5分）AHumans produce more than 300 million tons of plastic every year. Almost half of that winds up in landfills(垃圾填埋场),

5、 and up to 12 million tons pollute the oceans. So far there is no effective way to get rid of it, but a new study suggests an answer may lie in the stomachs of some hungry worms. Researchers in Spain and England recently found that the worms of the greater wax moth can break down polyethylene, which

6、 accounts for 40% of plastics. The team left 100 wax worms on a commercial polyethylene shopping bag for 12 hours, and the worms consumed and broke down about 92 milligrams, or almost 3% of it. To confirm that the worms chewing alone was not responsible for the polyethylene breakdown, the researcher

7、s made some worms into paste(糊状物) and applied it to plastic films. 14 hours later the films had lost 13% of their mass apparently broken down by enzymes (酶) from the worms stomachs. Their findings were published in Current Biology in 2017.Federica Bertocchini, co-author of the study, says the worms

8、ability to break down their everyday food beeswax also allows them to break down plastic. Wax is a complex mixture, but the basic bond in polyethylene, the carbon-carbon bond, is there as well, she explains, The wax worm evolved a method or system to break this bond. Jennifer DeBruyn, a microbiologi

9、st at the University of Tennessee, who was not involved in the study, says it is not surprising that such worms can break down polyethylene. But compared with previous studies, she finds the speed of breaking down in this one exciting. The next step, DeBruyn says, will be to identify the cause of th

10、e breakdown. Is it an enzyme produced by the worm itself or by its gut microbes(肠道微生物)?Bertocchini agrees and hopes her teams findings might one day help employ the enzyme to break down plastics in landfills. But she expects using the chemical in some kind of industrial process not simply millions o

11、f worms thrown on top of the plastic.1. What can we learn about the worms in the study?A. They take plastics as their everyday food.B. They are newly evolved creatures.C. They can consume plastics.D. They wind up in landfills.2. According to Jennifer DeBruyn, the next step of the study is to .A. ide

12、ntify other means of the breakdownB. find out the source of the enzymeC. confirm the research findingsD. increase the breakdown speed3. It can be inferred from the last paragraph that the chemical might .A. help to raise worms B. help make plastic bagsC. be used to clean the oceans D. be produced in

13、 factories in future4. What is the main purpose of the passage?A. To explain a study method on worms.B. To introduce the diet of a special worm.C. To present a way to break down plastics.D. To propose new means to keep eco-balance.BSince the first Earth Day in 1970, Americans have gotten a lot “gree

14、ner” towards the environment. “We didnt know at that time that there even was an environment, let alone that there was a problem with it，” says Bruce Anderson, president of Earth Day USA.But what began as nothing important in public affairs has grown into a social movement. Business people, politica

15、l leaders, university professors, and especially millions of grassroots Americans are taking part in the movement. “The understanding has increased many, many times，” says Gaylord Nelson, the former governor from Wisconsin, who thought up the first Earth Day. According to US government reports, emis

16、sions(排放) from cars and trucks have dropped from 10.3 million tons a year to 5.5 million tons. The number of cities producing CO beyond the standard has been reduced from 40 to 9.Although serious problems still remain and need to be dealt with, the world is a safer and healthier place. A kind of “gr

17、een thinking” has become part of practices.Great improvement has been achieved. In 1988 there were only 600 recycling programmes; today in 1995 there are about 6，600.Advanced lights, motors, and building designs have helped save a lot of energy and therefore prevented pollution.Twenty-five years ago

18、, there were hardly any education programmes for environment. Today, its hard to find a public school, university, or law school that does not have such a kind of programme. “Until we do that, nothing else will change！” says Bruce Anderson.5. According to Anderson, before 1970, Americans had little

19、idea about _A. the social movement B. recycling techniquesC. environmental problems D. the importance of Earth Day 6. Where does the support for environmental protection mainly come from?A. The grassroots level. B. The business circle. C. Government officials. D. University professors. 7. What have

20、Americans achieved in environmental protection?A. They have cut car emissions to the lowest. B. They have settled their environmental problems. C. They have lowered their CO levels in forty cities.D. They have reduced pollution through effective measures.8. What is especially important for environme

21、ntal protection according to the last paragraph?A. Education. B. Planning. C. Green living. D. CO reduction. IV读后续写，阅读下面短文，根据所给情节进行续写，使之构成一个完整的故事。On a bright, warm July afternoon, Mac Hollan, a primary school teacher, was cycling from his home to Alaska with his friends. One of his friends had stopp

22、ed to make a bicycle repair, but they had encouraged Mac to carry on, and they would catch up with him soon. As Mac pedaled (骑行) along alone, he thought fondly of his wife and two young daughters at home. He hoped to show them this beautiful place someday. Then Mac heard quick and loud breathing beh

23、ind him. “Man, thats a big dog!” he thought. But when he looked to the side, he saw instantly that it wasnt a dog at all, but a wolf, quickly catching up with him. Macs heart jumped. He found out his can of hear spray. With one hand on the bars, he fired the spray at the wolf. A bright red cloud env

24、eloped the animal, and to Macs relief, it fell back, shaking its head. But a minute later, it was by his side again. Then it attacked the back of Macs bike, tearing open his tent bag. He fired at the wolf a second time, and again, it fell back only to quickly restart the chase (追赶).Mac was pedaling hard now. He waved and yelled at pas