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How Do Animals Catch Their ZZZ’s?

Different creatures have developed some pretty creative ways to get their rest and stay safe. The lizard(蜥蝎)likes to sleep at the far end of small branches hanging out over a pond or lake in the rain forest. If a snake tries to slither up the branch to eat it ,it will shake the branch and knock the lizard off ,and the lizard will fall safely into the water. Chameleons can change color to match their surroundings in order to hide even while sleeping.

Corillas(大猩猩)like to sleep high in the trees. They build a new bed every night, sometimes taking up to half an hour to pile branches ,twigs ,and leaves into a comfortable bed .Birds also find it safe to sleep in the trees, but unless they have eggs or young chicks ,they don’t use a nest .They just lock their feet around a branch and hang on .A special tendon(腱)in their legs in automatically tight when they are at rest ,so they won’t let go and fall.

Dolphins live underwater ,but must come to the surface to breather .Scientists now believe that dolphins may sleep with only half their brain, while the other half stays awake to keep them safe and breathing. Seals also do this ,lying on their sides on the surface of the water with one flipper underwater paddling to keep their noses above the surface. Some ducks may also have this ability, and actually sleep with one eye closed and one eye open.

56.How many animals are mentioned in this passage?

A.6.B.7.C.8.D.9.

57.How does a chameleon protect itself while sleeping?

A.By changing its body colors.B.By hinging out over a pond.

C.By sleeping with half their brain.D.By making beds with branches.

58.Why will not birds fall when they are at rest?

A.They build nests and sleep in them.B.They fall asleep automatically.

C.They have a loose tendon in their legs.D.They lock their feet around a branch.

59.What does the writer intend to tell us?

A.The cleverest animal is the gorilla because it can make beds.

B.Differences in habitat could lead to different living habits.

C.The ways animals catch their ZZZ’s are pretty much he same .

D.In order to protect themselves most animals choose not to sleep.

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