How Do Animals Catch their ZZZ's? Different creatures have developed some pretty

How Do Animals Catch their ZZZ's（打鼾声）？

Different creatures have developed some prettycreative ways to get their rest and stay safe． Thelizard likes to sleep at the far end of small branches hanging out over a pondor lake in the rain forest． If a snake tries toslither up the branch to eat it, it will shake the branch and knock the lizardoff, and the lizard will fall safely into the water． Chameleons can change color to match theirsurroundings in order to hide even while sleeping．

Gorillas like to sleep high in the trees． They build a new bed every night, sometimes taking upto half an hour to pile branches, twigs, and leaves into a comfortable bed． Birds also find it safe to sleep in the trees, butunless 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 in their legs is automatically tightwhen they are at rest, so they won't let go and fall．

Dolphins live underwater, but must come to the surfaceto breathe． Scientists now believe that dolphins maysleep with only half their brain, while the other half stays awake to keep themsafe and breathing． Seals also do this, lying on their sideson the surface of the water with one flipper underwater paddling to keep theirnoses above the surface． Some ducks may also have this ability, andactually sleep with one eye closed and one eye open．

1.How does a chameleon protect itself while sleeping?

A．By changingits body colors

B．By hangingout over a pond．

C．By sleepingwith half their brain．

D．By makingbeds with branches．

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

A．They buildnests and sleep in them．

B．They fallasleep automatically．

C．They have aloose tendon in their legs．

D．They locktheir feet around a branch．

3.How do dolphins breathe?

A．They breatheunderwater．

B．They come tothe surface to breathe．

C．They breatheunderwater or come to the surface to breathe．

D．We don't know．

4.What does the writer intend to tell us?

A．The cleverestanimal is the gorilla because it can make beds．

B．Differencesin habitat can lead to different living habits．

C．The waysanimals catch their ZZZ's are pretty much the same．

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

试题答案

【答案】

1.A

2.D

3.B

4.B

【解析】

试题