Bob tried to sweet-talk his mother into letting him go out. But when he saw his sweet tal

Bob tried to sweet-talk his mother into letting him go out. But when he saw his sweet talk ， he lost his temper.
A. hadn’t worked
B. wasn’t working
C. isn’t working
D. doesn’t work

A. hadn’t worked(答案→)B. wasn’t workingC. isn’t workingD. doesn’t work解析：考查时态：句意：鲍勃试图用花言巧语骗诱妈妈让她出去，但是当他看见他的花言巧语没有用的时候，他发脾气了。从前面的句子：Bob tried to sweet-talk his mother into letting him go out可知是发生在过去的事情，排除CD，因为是先花言巧语骗诱妈妈，然后才发现不管用，所以不是过去完成时，用过去进行时，表示当时的情况，选B。

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