A
有了by明顯是被動(dòng)態(tài),信是被他寫的,排除D
主語letter,謂語hasn't been posted,所以不可能還存在其他的動(dòng)詞或be動(dòng)詞
written by him 是修飾letter的
The letter --- by him hasn't been posted yet A.written B.was written C.is written D.writing
The letter --- by him hasn't been posted yet A.written B.was written C.is written D.writing
英語人氣：932 ℃時(shí)間：2020-03-20 08:27:06
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