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【题目】We don’t doubt _____ he will succeed in the research work.

A. thatB. whether

C. howD. what

【答案】A

【解析】

考查名词性从句。句意:我们不怀疑他会在研究工作中取得成功。动词doubt在否定句或疑问句中通常接that引导的从句。故选A

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