《2025年期末直通车八年级英语上册人教版》

D（2025·宁波镇海）
Do Animals Really Sleep for Winter?
For people who don’t like winter，animals that hibernate（冬眠）seem to have the right idea. But is hibernation the same as sleeping?
Well，in fact，animals that hibernate don’t “sleep” during winter. Hibernation is very different from what happens when you sleep. During hibernation，metabolism（新陈代谢）slows down greatly. When lemurs（狐猴）hibernate，for example，they slow their heart rates. An active lemur’s heart beats 300 times a minute. During hibernation，it beats less than six times a minute. Its breathing slows down too. Hibernating lemurs can go ten minutes without taking a breath. Their brain activity becomes very slow. During sleep，however，animals continue to breathe as usual.
According to scientists，hibernation is a way for animals to save energy. However，animals that live in cold areas are not the only ones to hibernate. Some animals hibernate to beat the heat. For some，hibernation is not because of temperatures. Some animals hibernate when there is no food. Echidnas（针鼹），for example，will hibernate after fires. They won’t go back to usual activities until food grows back. Some animals hibernate to stay safe. Animals don’t smell or move much when they hibernate. This makes it hard for other animals to find them and eat them.
There are many mammals（哺乳动物）that hibernate. Most of them are small—weigh less than 90 grams. Little animals usually lose heat quickly. It is hard for them to stay warm in winter，so they need to save more energy than larger animals do.
We human beings don’t need hibernation. So，don’t be lazy and lie in bed all day long during the coming winter holiday!
( )27. According to the article，during hibernation，animals ________.
A. lose weight
B. stop breathing
C. slow down their brain activity
D. breathe quickly
( )28. The author uses the example of echidnas to show that ________.
A. hibernation is different from sleeping
B. most mammals don’t need hibernation
C. during hibernation，metabolism slows down
D. hibernation isn’t always because of temperatures
( )29. According to the article，mammals that hibernate are usually ________.
A. small in size
B. young in age
C. tall in height
D. heavy in weight
( )30. By writing this article，the author mainly wants to ________.
A. tell people more about hibernation
B. stop young people from getting lazy
C. explain why human beings don’t need hibernation
D. list the differences between hibernation and sleeping

答案： 27—30 CDAA