摘要：2044] I doubt he will come here on time. [译文] 我怀疑他是否能按时来这儿. A. that B. whether C. when D. where [答案及简析] B. doubt在否定句或疑问句中.后面的从句用that引导,在肯定句中时.后面的从句用whether / if引导.

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