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英语
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－Certainly.We____friends since ten years ago.A.were B.have made C.have become D.have been
为什么不能选择c?
人气：361 ℃ 时间：2019-11-04 22:35:19
解答
become是终止性动词,其的现在完成时的肯定式不能与FOR/SINCE 短语连用,正确答案是D
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