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1、Unit 2 English around the world 课时作业Learning about language第一节、用方框内所给短语的正确形式填空。be used to, pick up, be filled with, at the end of, come into effect, make a sudden decision, react to, come out, crowds of, warm up1. With the fire on, the room should soon.2. The old man has living a simple life.3. Her
2、son always studies hard and ambition to become a great inventor.4. He stopped the car to the boy on his way to the market.1.1 need some time to think it through I dont want to.6. My teacher asked me to add my name the letter of application.7. His new novel will in November this year.8. Everyone make
3、s mistakes, but the real test is how you that.9. The law on last New Years Day.10. Wherever the film star goes, there are people waiting to see her.答案、1. warm up 2. been used to 3. is filled with 4. pick up 5. make a sudden decision6. at the end of 7. come out 8. react to 9. came into effect 10. cro
4、wds of 第二节、单句改错Although hes nearly fifty, but he can still play tennis well.1. Computers can be used to doing lots of work nowadays.2. It will take more several months to finish the project even though we are working harder.3. You will have to get everything ready for the party before I will come th
5、is evening.4. Through his life he wrote novels, short stories, biographies, operas and so on.【答案】、去掉 Although 或 but1. doing 改为 domore several 改为 several more2. 去掉从句中的willThrough 改为 Throughout第三节阅读理解AAristotle was among the first thinkers to become interested in the red snow on Mount Parnassus in the
6、 4th century BC. The Greek philosopher owed the colour to hairy worms living in freezing conditions at high altitude. The phenomenon has puzzled scientists ever since. Now a team of French researchers find that snow is getting redder all the time.The red is indeed produced by organisms in the snow -
7、 not by hairy worms, but by microalgac（微藻类）that inhabit ecosystems up to 3, 000 metres above sea level. The microalgae that are green and invisible in the winter become loaded with pigments（色 索）in the summer which protect them from the sun, turning the snow reddish. Its when the suns rays become str
8、ong that the microalgae create a protective layer of red molecules（分子）that are like a sun cream.The researchers say on their website, “The appearance of4red snows seems to be more and more frequent at high altitudes, as well as in the Arctic and Antarctic regions.” One explanation for the spread of
9、red snows could be global warming, the scientists say. Microalgae capture carbon dioxide when exposed to light, turning it into organic matter and placing it at the foundation of ecosystems in soil, water and snow. With climate change, the amount of carbon dioxide in the atmosphere is increasing. 4t
10、It is therefore expected that certain microalgac respond positively to this increase, behaving as markers of climate change/ the website says.Yet scientists are unsure about what impact the microalgae have on melting glaciers and snow. They suspect that because the red pigments absorb the heat they
11、are accelerating environmental change. Even if it is fantastic to see microalgae developing in the snow, one of the consequences is. the disappearance of their environment, the researchers added.1. What caused the red snow according to the Greek philosopher?A. High altitude.B. A kind of worms.C. The
12、 microalgae.D. The freezing conditionsWhy do the microalgac turn red in the summer?A. To generate a sun cream.B. To be loaded with pigments.C. To attract peoples attention.D. To defend themselves from the sun.2. What can we learn about the red snow in paragraph 3?A. It can contribute to global warmi
13、ng.B. It can indicate the rise of carbon dioxide.C. It increases carbon dioxide in ecosystems.D. It disappears from the Arctic and Antarctic regions.3. Which of the following is a suitable title for the text?A. Red snow sends a warning.B. Microalgae grow in red snow.C. Microalgac stand climate chang
14、e.D. Red snow dances at high altitude.【答案】i.B 2.D3.B4. ABTeens who have good, supportive relationships with their teachers enjoy better health as adults, according to research published by an American research center.“This research suggests that improving students* relationships with teachers could
15、have positive and long-lasting effects beyond just academic success,M said Jinho Kim, a professor at Korea University and author of the study. It could also bring about health implications in the long run.Previous research has suggested that teens, social relationships might be linked to health outc
16、omes in adulthood. However, it is not clear whether the link between teen relationships and lifetime health is causal （因果的）一 it could be that other factors, such as different family backgrounds, might contribute to both relationship problems in adolescence and to poor health in adulthood. Also, most
17、 research has focused on teens* relationships with their peers （同龄人），rather than on their relationships with teachers.To explore those questions further, Kim analyzed data on nearly 20,000 participants from the Add Health study, a national study in the U.S. that followed participants from seventh gr
18、ade into early adulthood. The participant pool（人员） included more than 3,400 pairs of siblings （兄弟姐妹）.As teens, participants answered questions, like “How often have you had trouble getting along with other students and your teachers?” As adults, participants were asked about their physical and menta
19、l health.Kim found that participants who had reported better relationships with both their peers and teachers in middle and high school also reported better physical and mental health in their mid-20s. However, when he controlled for family background by looking at pairs of siblings together, only t
20、he link between good teacher relationships and adult health remained significant.The results suggest teacher relationships are more important than previously realized and that schools should invest in training teachers on how to build warm and supportive relationships with their students. This is no
21、t something that most teachers receive much training in,“ Kim said, “but it should be.”What does the underlined word “implications“ in Paragraph 2 refer to?A. Recipes. B. Benefits.C. Habits.D. Risks.4. What is Paragraph 3 mainly about?A. Poor health in adolescence.B. Limitations of the previous rese
22、arch.C. Teens* relationships with their peers.D. Factors affecting health in adulthood.5. What does Kims research show?A. Good adult health depends on teens, good teachers.B. Good family background promises long-term adult health.C. Healthy peer relationships lead to students academic success.D. Positive sludent-teacher relationship helps students, adult health.6. Where does this text probably come from?A. A health magazine.C. A term paper.【答案】BBDAB. A medical report.D. A family survey.