题目内容
【题目】He ________ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.(2013湖南)
A. wouldn’t
B. shouldn’t
C. couldn’t
D. mustn’t
【答案】C
【解析】考查情态动词。根据后文“although he tried to”可知他不能入睡。故答案选C。
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