问题 选择题

His ability is never in doubt----the question is _______he is prepared to work hard.

A. whether

B.if

C.that

D.where

答案

答案:A

考查名词性从句。句意:他的能力是不容置疑的——问题是他是否准备努力工作。if不可引导表语从句。

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