题目内容
Mr. Blake __________my letter, otherwise he would have replied by now.
| A.will not have received | B.needn’t have received |
| C.shouldn’t have received | D.couldn’t have received |
D
考查情态动词。couldn’t have done不可能做过某事。句意:布莱克先生不可能收到我的来信,否则如今他会回复了。
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