No one doubts ______ he is the best leader in the company.A、whetherB、ifC、what

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问题 No one doubts ______ he is the best leader in the company.

选项 A、whether
B、if
C、what
D、that

答案 D

解析 doubt用在否定句中其后的宾语从句要用that引导；用在肯定句中其后的宾语从句要用if或whether引导。

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