问题补充:
There is no doubt Tom is a good clever boy.
A. whether
B. if
C. when
D. that
答案:
A. whether
B. if
C. when
(答案→)D. that
解析:考查doubt固定用法。当到doubt前为肯定形式时,后接if或者whether从句;当doubt前为否定形式时,后接that从句。No表达否定含义,故选D。
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