Jane______my letter; otherwise she would have replied before now.

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问题 Jane______my letter; otherwise she would have replied before now.

选项 A、ought to have received
B、has received
C、couldn’t have received
D、hadn’t received

答案C

解析情态动词题。couldn’t have+过去分词，表示对已发生情况的否定推测，意为“一定没……”。结合后半句语义，可知Jane并没有收到信，故C正确。

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专业英语四级

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