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英语
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You must have been to London for many times,__you
为什么选 haven‘t而不是didn't
人气:170 ℃ 时间:2020-04-25 07:05:10
解答
情态动词+have+done 有两种含义 1.表示过去所发生的2.表示已完成的动作 本题中,根据句意,表示已完成,所以答案.
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