問題詳情

     Unlike most mammals, giraffes sleep very little. In fact, scientists have   (31)     that some giraffes sleep only thirty minutes a day on average. When a giraffe sleeps, it curls its neck and lays its head on its   (32)    . However, there are often predators around, and a giraffe can’t stand up from this position very quickly. Therefore, a giraffe never naps for too   (33)    .
     Sea otters, one of the world’s cutest animals, perhaps have the cutest sleeping position. Groups of sea otters float on their backs and   (34)     hands while they are sleeping! They can rest on the land, but they are much   (35)     in the water. To avoid floating away, they lock their little paws together and hold on to each other.
31.
(A) long
(B) reported
(C) safer
(D) hip
(E) hold

參考答案

答案：B
難度：非常簡單1
書單：沒有書單，新增

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