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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.

Julia Hill, an American woman, found out that a company wanted to cut down part of a forest in California. There were lots of redwood trees in the_______. One of the trees was 70 metres tall and about 1,000 years old.

Julia wasn’t _______ about this. She went to California and climbed up the tree. “If I sit in the tree,” she said, “the company can’t cut it down.” At the beginning, Julia planned to stay in the tree for two weeks. She_______ in a small tree-house and her friends were very helpful — they made _______ for her every day. She used her _______ to talk to her family and to news reporters (记者). She stayed in the tree_______.

Many people helped her, but other people didn’t. They tried to_______ her. The company used a helicopter (直升机) to stay near her tree-house for a long time. The helicopter was very _______ and there was a lot of wind. Julia didn’t like it, but she stayed in the tree.

In the end, she was_______. The company told her that they wouldn’t cut down the redwood. Finally, after two years and eight days in the tree, Julia Hill climbed ________ and walked on the ground again. She and her friends were very happy.

1.A.city B.town C.forest D.country

2.A.excited B.happy C.wonderful D.careful

3.A.slept B.studied C.worked D.lived

4.A.food B.money C.friends D.music

5.A.tape B.board C.mobile phone D.camera

6.A.for a time B.every time C.now and then D.day and night

7.A.believe B.stop C.change D.excuse

8.A.noisy B.heavy C.high D.safe

9.A.rude B.angry C.hungry D.successful

10.A.up B.down C.in D.out

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