I do not doubt_______he will appear soon. ( )

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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,用于肯定句时,引导的从句应用连接词whether或if连接;但当doubt用于否定句和疑问句时,应该用that连接。答案为A。
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