人教版新课标高中英语 2019-2020年 必修二 Unit 4 Wildlife protection 单元测试 含答案详解
Unit 4 Wildlife protection
本套试卷分为第Ⅰ卷和第Ⅱ卷两部分。总分120分。考试时间100分钟。
第Ⅰ卷
Ⅰ.阅读理解(共两节，满分35分)
第一节(共10小题；每小题2.5分，满分25分)
A
I suddenly heard an elephant crying as though frightened. Looking down, I immediately recognized that something was wrong, and ran down to the edge of the near bank. There I saw Ma Shwe with her three-month-old calf struggling in the fast-rising water, and it was a life-and-death struggle. Her calf was floating and screaming with fear. Ma Shwe was as near to the far bank as she could get, holding her whole body against the rushing water, and keeping the calf pressed against her huge body. Every now and then the rushing water would sweep the calf away. There was a sudden rise in the water and the calf was washed clean over the mother's body and was gone. Ma Shwe turned quickly to reach it and pressed the calf with her head and trunk(象鼻) against the rocky bank. Then with a huge effort, she picked it up in her trunk and tried until she was able to place it on a narrow shelf of rock.
Just at this moment, she went back into the river. If she were carried down, it would be certain death. I knew, as well as she did, that there was one spot (地点) where she could get to the bank, but it was on the other side from where she had put her calf. While I was wondering what I could do next，I heard the sound of a mother's love.Ma Shwe had crossed the river and got to the bank and was making her way back as fast as she could，roaring(吼叫) all the time，but to her calf it was music.
1．The moment the author got down to the river bank he saw________. A．the calf was about to fall into the river B．Ma Shwe was placing the calf on the rock C．the calf was washed away by the rising water
D．Ma Shwe was holding the calf against the rushing water
2．How did Ma Shwe manage to save her calf from the fast-flowing water? A．By putting it on a safe spot. B．By pressing it against her body.
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人教版新课标高中英语 2019-2020年 必修二 Unit 4 Wildlife protection 单元测试 含答案详解
C．By taking it away with her. D．By carrying it on her back.
3．What can be the best title for the text? A．A mother's love B．A brave act
C．A deadly river D．A matter of life and death
B
Energy goes from one plant or animal to another. A food chain shows how this energy moves. Each time an animal gets eaten, its energy is passed onto the animal that eats it. The food chain is very important because it keeps the balance of nature. If one part of the food chain disappears, it can affect all the other plants and animals. Any threat to the food chain is a threat to the environment's biodiversity(生物多样性). The food chain helps keep animal populations in balance. However, if something happens to damage one of the links in the food chain, that balance is broken. If one animal becomes endangered, it puts all the animals above it at risk.
Some of the threats are natural, such as wildfires, hurricanes, tornados, floods and so on. But the biggest threats to the food chain come from you and me. These threats include overfishing, logging, farming, development, pollution, etc. The food chain is endangered everywhere humans have had an effect on the natural environment.
A recent study shows that the overfishing of large sharks is damaging the food chain along the US Atlantic coast. Canadian and American scientists say sharks are being killed in great numbers for their meat and fins(鳍). Now, not enough sharks are around to eat the cownose ray. The ray's population has increased and they have eaten up the shellfish to the point where it has hurt commercial(商业的) fishing.
Many of us disturb the natural environment in our own backyards. It's up to us to take care of the environment and try not to disrupt the natural food chain. If we don't act responsibly, animals will start disappearing.
4．What can we learn from Paragraph 1? A．The food chain is not easy to be broken.
B．The energy of an animal usually disappears when it dies. C．Increasing the links will not break the balance of nature.
D．Breaking the food chain is bad for the biodiversity of the environment.
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人教版新课标高中英语 2019-2020年 必修二 Unit 4 Wildlife protection 单元测试 含答案详解
5．The study mentioned in Paragraph 3 proves that ________. A．human activities can be a big threat to the food chain B．we are all responsible for the breaking of the food chain C．natural disasters are hard to break the food chain D．hunting large sharks for meat is beneficial
6．We can infer that the writer wrote this passage mainly to ________. A．explain what the food chain is
B．tell us something interesting about nature C．suggest that we stop eating meat to save animals D．suggest that we should not disrupt the natural food chain
C
There are few creatures in the world as elegant as the bald eagle(秃鹰). That's part of the reason why, out of all of the animals in the world, the United States of America chose the bald eagle as the national bird.
Unfortunately, despite being beautiful, brave, and fiercely independent, these eagles haven't always had the easiest time of it.
Like many of the disappearing animals, these creatures have suffered over the last century. The massive, elegant hunters once lived all across North America before their populations started decreasing sharply—largely due to the use of some pesticides (杀虫剂). In fact, researchers estimate that in the 1800s, there were hundreds of thousands of these birds, but by the 1950s there were fewer than 1，000 of these beautiful wild animals left.
But just when things were looking hopeless, this nation banded together, and decided that it was time, once and for all, to do something to save the national bird!
In the 1940s, an act was put into place to protect bald eagles from all forms of trapping and hunting.
By 1967, the populations had made some small strides, though the numbers were still low enough for the bird to be placed on the endangered species list.
Then, in the 1970s, the United States made the biggest step towards protecting the eagle (and countless other species) by banning the pesticide DDT.
In humans, the pesticide DDT is poisonous and linked to cancer. In birds, it causes eggshells to become too thin and the bird eggs will hatch(孵化) too soon, keeping bird populations from growing.
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人教版新课标高中英语 2019-2020年 必修二 Unit 4 Wildlife protec
