A
阅读短文,将方框内的三个主题句与对应的段落匹配,并回答第4题。
A. Do Fish Sleep? B. Why Do Fish Sleep? C. How Do Fish Sleep?
1.
Fish swim all day long. They must get really tired, and they may want to get some “shut-eye”. Most fish, however (然而), have no eyelids. So do they really sleep? Most of them do sleep, but it’s hard to tell if they’re sleeping or not.
2.
Fish live in the water, so they don’t lie down to sleep like humans. That could be dangerous. Only part (部分) of their brain sleeps at a time, so they do rest but they are never completely (完全地) asleep. Some fish, such as the shark, even keep swimming in their sleep.
3.
Sleeping is very important. If we do not have a good sleep, we get tired and unhappy. This is because when we sleep, the body can clean itself of waste (垃圾) and repair (修复). Fish also need sleep, so they can repair their cells (细胞) and save energy (精力), too.
4. Do you want to find more about the topic of fish sleeping? List your ideas and collect relevant information.

1.A 2.C 3.B
4. Possible versions: (1) Do all fish sleep the same way? (2) Can fish sleep with their eyes open? (3) How do fish rest without falling?