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单选题
123.Stephen my letter, otherwise he would have replied before now.
A
A. ought to have received
B
B. could have received
C
C. couldn＇t have received
D
D. shouldn＇t have received
答案解析
正确答案：C
解析：
123.【翻译】 斯蒂芬不可能收到了我的信，否则在这之前他就已经回信了，【精析】C "ought to have +过去分词”表示与过去事实相反的假设，意为“本该做 （却没有做）” ；“could have + 过去分词”表示与过去事实相反的假设，意为“本可以做……（实际上却没有做）”，其否定形式为“ couldn＇t have +过去 分词”，只能表示对过去发生事情的否定推测，相当于“can" have +过去分词”，意为“不可能……，不会……”； “shouldn＇t have +过去分词”表示“本不应该做……却做了”。根据句意可知，选C。
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