I Mr. Smith since he moved to Shanghai.A. didn’t hear fromB. don’t hear fromC. won’t hear

I Mr. Smith since he moved to Shanghai.
A. didn’t hear from
B. don’t hear from
C. won’t hear from
D. haven’t heard from

A. didn’t hear fromB. don’t hear fromC. won’t hear from(答案→)D. haven’t heard from解析：现在完成时用来表示之前已发生或完成的动作或状态，其结果的确和现在有联系。动作或状态发生在过去　但它的影响现在还存在；也可表示持续到现在的动作或　状态。其构成： have (has) +过去分词。根据语境可知此句的含义是自从史密斯先生来到上海我从来没有受到他的来信。因主语是I,故用助动词have not+过去分词,故选D.

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