There are more sleepwalkers than generally reported because ______. That the sleepwalkers is about half--and--half means ______

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问题 There are more sleepwalkers than generally reported because ______.
That the sleepwalkers is about half--and--half means ______.

选项 A、the sleepwalking is neither completely awake nor completely asleep.
B、half sleepwalkers are awake and half are asleep.
C、half of the time he is awake and half of the time he is asleep.
D、sometimes he knows what he is doing.

答案A

解析 本题为判断题。“half-and-half”之意为“一半对一半”,到底一半对一半什么,只能从上下文来看。本文第二段第一句问梦游者是醒着还是睡着,接下来说梦游者的肌体处于醒着的状态,即他们能活动,但不知自己在干什么,所以A为正确选项。 B“一半的梦游者是醒着的,一半是睡着的”;C“梦游者有一半的时间是醒着的,另一半时间是睡着的”和D“有时他知道他在干什么”都不符合上下文。
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