DoyoustillrememberthedaywhenwewenttoYangliuqing?Ican’trememberitwell,

发布时间：2020-08-07 01:55:22

Do you still remember the day when we went to Yangliuqing?I can’t remember it well, but ______ it have been sometime last summer?A.wouldB.mustC.couldD.should

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C解析could have done用在疑问句中表示对过去的事情的推测。
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