Every means _but without much result.A.have been tried B.has been tried C.have tried D has tried.
选哪个,为什么?
人气：289 ℃ 时间：2020-03-27 08:05:30
解答
B means 是一个单复数同形的词.Every means 每一个方法,所以用单数.而且是已经被尝试.所以用被动.请问，为什么不选，has tried.每种方法已经被尝试，所以要用现在完成时的被动。
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