2021春人教英语必修3(四川专用)课时作业：unit-5-第4课时.docx

Unit 5　 第四课时

Ⅰ.六选五
依据短文内容，从下面的选项中选出能概括每一段主题的最佳选项。选项中有一项为多余项。
A．The likely reason of global warming
B．Global warming—a world problem
C．The fast increase in recent years
D．What we should do to avoid greenhouse gases producing
E．The earth is becoming warmer
F．Different opinions on the cause of global warming
1．________
Is the world warming up? According to many reports, the answer is yes. Eleven of the hottest years since 1850 appeared between 1995 and 2006. Last year, the United Nation's Intergovernment Panel on Climate Change (IPCC) reported the earth was about 0.75℃ warmer than it was in 1850. While this doesn't sound like a lot, a small difference in average temperature can make a big difference in climate. During the last Ice Age, the planet was only about five degrees colder than now.
2．________
It's all about the speed at which temperatures are changing. In the past, temperatures moved up or down step by step. But in the 20th century, especially since 1976, temperatures have likely risen more quickly than during any century in the last 1000 years. Warming may bring improved harvests to northern countries such as Canada and Russia. However, many species won't like these conditions. They begin moving towards cooler places and cause lots of trouble to human world.
3．________
The IPCC reported that human activity is very likely responsible by increasing the greenhouse effect. Some gases cause the air to take in heat energy. Without the greenhouse effect, the earth's average temperature would be －18℃ rather than the present comfortable 14.6℃. The main greenhouse gases are carbon dioxide, water vapor and some other gases. Burning oil, coal and waste adds to the carbon dioxide, and it has increased 35% since 1850.
4．________
Many researchers have found that natural forces alone don't explain the temperature increases over the last 30 to 40 years. Their study shows that as carbon dioxide goes up, temperature will rise, too. But some scientists don't agree. They think the effect of human produced greenhouse gases is very small compared to the normal changes that the climate causes.
5．________
When asked whether humans are causing the world warming, Carl Wunsch, a professor at Massachusetts Institute of Technology says, “ It seems very likely from what I've seen. Is it 100% sure? No. There is something to do with natural changes.” Does that mean we should have a “wait­and­see” attitude? Not according to Wunsch. He points out we buy house insurance not because we are sure our homes will be on fire, but because it's a danger we'd rather avoid.
答案：1－5　ECAFD
Ⅱ.阅读表达
阅读下面短文，并依据短文后的要求回答问题(请留意问题后的字数要求)。
[1]Canadian culture was heavily influenced by British culture and traditions.Now one can also notice the influence of American culture.Over the years, lots of people have moved to Canada.There has been a healthy change of Canadian's ideas that has resulted in the development of certain special features in Canada.The people of Canada have always been proud of their diverse cultural backgrounds.
[2]Art: Canada has some of the most wonderful classical works of art.In the year 1930, artists began developing their own personal style.The “Group of Seven” is considered to be the first group of native artists to create their own style.

[3]Language and religion: Because of its diverse cultures, Canada has two official languages, English and French.There is ________.A number of people in Canada have confirmed that they have no religious belief, though there are many other groups that follow Protestantism as a religion.
[4]Literature: The literature of Canada basically shows the different cultural influences of other countries.Some of the early works were divided according to the region of Canada from which the author came, but there were also authors who gave a humorous touch to serious contents.A number of authors have been awarded for their literature works.
[5]Music: Music in Canada has seen many developments in styles along the way.Many Canadian; musicians have earned worldwide fame.From folk music to rock, Canadian music continues to entertain people.In recent years, music from Asia and Africa has found quite a fan following in Canada.
1．What is the main idea of the text? (no more than 3 words)
________________________________________________________________________
2．Fill in the blank in Paragraph 3 with proper words. (no more than 3 words)
______________________________________________________________
3．What does the word “their” (Para. 1) refer to? (no more than 2 words)
________________________________________________________________________
4．Canadian culture has been influenced by many other countries.List all of them mentioned in the text.
_____________________________________
5．Complete the following statement with proper words.(no more than 5 words)
Recently, music from Asia and Africa has become ______ in Canada.
答案：
1．Canadian culture
2．no official religion
3．Canadians'/Canadian people's
4．British, American, Asian and African cultures
5．more and more popular
Ⅲ.任务型读写
阅读下面短文，依据所读内容在表格中的空白处填入恰当的单词。
留意：每个空格只填一个单词。
This year, about 2,300 teenagers from all over the world will spend about 10 months in US homes. At the same time about 1,300 American teenagers will go to other countries to learn new languages and learn the rest of the world.
Here is a 2­way student exchange in action. Fred,19, spent last year in Germany with George's family. In turn, George's son Mike spent a year in Fred's home in America.
Fred, a lively young man, knew little German when he arrived. But after 2 months of studying, the language became easy for him. School was completely different from what he had expected and it was much harder. Students rose respectfully when the teacher entered the room. They took 14 subjects instead of 6 that were usually taken in the US.
Family life, too, was different. The father's word was the law. All the activities were done with the family rather than individually. Fred found the food to be too simple at first. He also missed having a car.
“Back home，you pick up some friends in a car and go out to have a good time. In Germany, you walk but you soon learn to like it.”
At the same time, in America, Mike，a friendly German boy, was also forming his own ideas. “I suppose I should criticize American schools” he says, “It is far too easy for our level but I have to say that I like it a lot. In Germany, we do nothing but study. Here we take part in many other activities. I think that maybe American schools are better in training their citizens. There ought to be some middle ground between the two.”
1.________between American school life and German school life
Items (项目)
American students
German students
Class rules
They don't have to stand up
They have to rise and show 2._______for their teachers
3.____ life
They do their own things 4.________
They have to listen to their fathers as fathers always make the final
5．________.
School 6．____
They have six which are very easy to learn
They have 14 which are much more difficult
Going out
They can 7.________cars
They have to walk all the way
School life
They spend a lot of time taking part in 8.______
They spend a lot of time 9.________.
Conclusion
To Fred, the German school is completely different from his 10.________.
答案：1.Differences　2.respect　3.Family　4.individually
5．decision　6.subjects　7.drive　8.activities　9.studying
10．expectation
Ⅳ.补全对话
依据对话内容，从对话后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
—Can you help me?
—Sure, what's the problem?
—__1__
—Well, how about San Francisco? We went there last year and had a great time.
—__2__
—Well, there is Golden Gate Bridge of course, and Golden Gate Park. It's a really big park. You can go for long walks or take a rest in the Japanese Tea Garden. It's beautiful there.
—__3____
—There is also a place called Fisherman's Wharf. That's really popular with tourists. There are lots of shops, cafes and restaurants. And from there you can go on a boat trip to Alcatraz. You know, it's a small but very beautiful island.
—__4__
—No, you can't stay on the island; there aren't any hotels. You can only go for the day. I think I've still got a book about San Francisco. I can lend it to you.
—__5__
A．What can you do there?
B．Oh, great! What a great place to stay in!
C．What an idea! What is the best time to go there?
D．I can't decide where to go for the holiday—any ideas?
E．Thanks a lot. San Francisco, here I come!
F．Hmm, that sounds good.
G．How can I go there?
答案：1—5　DAFBE