Why ( ) the teacher let him ( ) the classroom yeserday afternoon A did.to clean B does.clean还有两个

Why ( ) the teacher let him ( ) the classroom yeserday afternoon A did.to clean B does.clean还有两个
英语人气:972 ℃时间:2020-02-01 08:10:54
优质解答
填 did clean
因为有yesterday,是过去时,助动词用did
let sb do .后面动词用原形
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