Mary ______ my letter; otherwise she would have replied before now.
A.hasreceivedB.oughttohavereceivedC.couldn’thavereceivedD.shouldn’thavereceived...
A. has received
B. ought to have received
C. couldn’t have received
D. shouldn’t have received 展开
B. ought to have received
C. couldn’t have received
D. shouldn’t have received 展开
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答案C
考查情态动词用法。关键后半句：要不然，她之前就会给我回信。根据这里的would have replied可知是对过去情况的虚拟，那么前一句也应该是对过去情况的推测。结合句意可知C正确。句意：玛丽不可能收到我的信得。要不然之前就会给我回信的。
考查情态动词用法。关键后半句：要不然，她之前就会给我回信。根据这里的would have replied可知是对过去情况的虚拟，那么前一句也应该是对过去情况的推测。结合句意可知C正确。句意：玛丽不可能收到我的信得。要不然之前就会给我回信的。
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