《2025年全优方案夯实与提高七年级英语上册外研版》

C
There are different kinds of animals living in the world. Some of them are small and some are big. But they all have one thing in common: sleep! All animals need sleep. Some sleep a little, others sleep a lot and some get their zzzz’s in interesting ways.
Light Sleepers
Giraffes sleep for just a few hours every day. It is not safe for them to sleep for a long time. Why? For one thing, predators, like a lion, might get them in that time. For another thing, it usually takes giraffes about one minute to stand up and run away at once, so they like sleeping standing up. But they often need to lie down to have a deep sleep for half an hour.
Big Sleepers
Koalas are animals that live in Australia. They may sleep 18 to 20 hours a day! They wake up, eat leaves and then go right back to sleep.
Lions are predators. They look for other animals as food. Lions are big sleepers, too. When lions are not eating, they usually play and sleep. They can sleep well. After all, who wants to wake up a sleeping lion?
Half-asleep
Scientists found that dolphins can sleep with half of their brains at a time. The other half stay awake! Like dolphins, when some birds fly far across the sea, they can also sleep with half of their brains and the other half keep flying. Other birds sleep for a short time when they float on air over the sea. They fly and sleep. After they get home, they sleep a lot.
(D)8. Giraffes sleep standing up most of the time because ______.
A. they are too tall to lie down
B. it is easy for them to eat when they wake up
C. they can sleep with half of their brains
D. they can run away quickly if there is danger
(B)9. What does the underlined word “predators” in Paragraph 2 mean in Chinese?
A. 嗜睡者 B. 捕食者 C. 侵略者 D. 幸存者
(A)10. ______ are light sleepers, ______ are big sleepers and ______ are half-asleep.
A. Giraffes; lions; birds B. Giraffes; birds; koalas
C. Lions; giraffes; dolphins D. Birds; koalas; giraffes
(C)11. The following statements about these animals are true EXCEPT ______.
A. dolphins and some birds have special brains
B. giraffes usually need a deep sleep for 30 minutes
C. birds don’t need much sleep because they never feel tired
D. lions sleep well because animals are afraid to go near them

答案： 8.D 9.B 10.A 11.C