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What the doctor really doubts is ______ my mother will recover from the serious disease soon.

A.when B.how C.whetherD.if

C

解析试题分析:考查表语从句:句意:医生真正怀疑的是是否我妈妈会从重病中迅速恢复。Is后面是表语从句根据句意是“是否“,但if不能连接表语从句,用whether。选C。
考点:考查表语从句
点评:表语从句的考查主要的考查陈述语序和连接词的词义辨析。要根据句意和成分判断选择连接词,如果不缺成分,就是用that,缺少主宾表,用what连接表语从句,语序要变成陈述句。

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