Question

阅读下面短文，根据短文内容完成句子。

Many ways to sleep

How do you sleep? Most people sleep on their backs or sides. Do animals sleep the same way? Actually, the ways they sleep are much more different — they can lie down, sit or stand while they sleep.

Swiss scientists did a study on 250 different mammals (哺乳动物). They found that the animals’ sleeping postures (姿势) had something to do with their size and weight.

Small animals with short legs sleep on their stomachs. Their body shape is perfect for this posture. They also like to put their legs under their bodies. Rabbits and cats sleep this way.

But larger animals sleep differently. They lie on their sides. That’s because this is more comfortable for their longer legs. Cows and hippos (河马) often sleep like this.

However, there are exceptions. Small animals such as mice sometimes sit down to take a short nap. Some large animals such as horses, zebras and giraffes sleep standing up. This way, they can immediately run away if they are in danger.

Did you know? Albatrosses are large seabirds. They can sleep while flying. They can even do that while flying at a speed (速度) of about 40 km an hour.

1.The ways animals sleep are much more________.

2.Animals’ sleeping postures have something to do with their________.

3.Rabbits and cats like to put their legs________ when they sleep.

4.Giraffes sleep standing up in order to run away________if they are in danger.

5.To our surprise albatrosses can sleep while________at a high speed.

Answer

1.different

2.size and weight

3.under their/the bodies

4.immediately

5.flying

【解析】

本文是一篇说明文，主要介绍了不同动物的睡觉姿势。

1.根据第一段“Actually, the ways they sleep are much more different”可知，动物的睡觉方式是不同的。故答案为different。

2.根据第二段“They found that the animals’ sleeping postures (姿势) had something to do with their size and weight”可知，动物的睡姿与它们的体型和体重有关。故答案为size and weight。

3.根据第三段“They also like to put their legs under their bodies. Rabbits and cats sleep this way”可知，兔子和猫睡觉时喜欢把腿放在身体下面。故答案为under their/the bodies。

4.根据倒数第二段“This way, they can immediately run away if they are in danger”可知，长颈鹿会站着睡觉，以便在遇到危险时立即逃跑。故答案为immediately。

5.根据最后一段“They can sleep while flying. They can even do that while flying at a speed (速度) of about 40 km an hour”可知，信天翁在高速飞行时可以睡觉。故答案为flying。