Thereusedtobeatallinfrontofour

发布时间:2020-07-10 13:15:44

There used to be a tall in front of our classroom, ________?













A.used there












B.didn't there











C.wasn't it











D.did it

网友回答

B解析“used to+动词原形”变否定或反意疑问句时有两种形式,一种是didn't use to,另一种是usedn't to。
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