单选题
According to the writer, it is difficult for you to go to sleep if ______.
A、
you get the habit of staying up late
B、
you haven't taken sleeping pills
C、
you sleep for hours after dinner
D、
you fail to do some exercises
【正确答案】
C
【答案解析】
[试题分析] 事实判断题。
[详细解答] 文章第一段指出The key to your problem is that long nap after dinner．因此，正确答案为C。
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