I do not doubt ________ he will appear soon.A、thatB、whetherC、ifD、whateverAdo

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问题 I do not doubt ________ he will appear soon.

选项 A、that
B、whether
C、if
D、whatever

答案 A

解析 doubt可作名词或动词，当doubt用于肯定句时，引导的从句应用连接词whether或者if连接；但当doubt用于否定句和疑问句时，应该用that连接。

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