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We had an anxious couple of weeks, for the results of the experiment.

A.wait B.to be waiting C.waited D.waiting

 

D

【解析】考查伴随状语。只有v.-ing形式表示与主句谓语动词处于同一时段的动作,故只有D正确。C项属于并列谓语,句中少and,排除。

 

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