There’s some doubt he’ll keep his promise.A. whether B. whenC. thatD. which

发布时间：2020-08-17 01:33:51

There’s some doubt     he’ll keep his promise.
A. whether
B. when
C. that
D. which

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(答案→)A. whether
B. when
C. that
D. which
解析：doubt疑惑;怀疑” ,在肯定句中doubt多接whether (一般不用if代替) 引导同位语从句。在否定句中，用that引导同位语从句。故选A。句意：有点怀疑他是否能遵守诺言。
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