I cleaned my classroom _____ A.with there hours B.three hours ago_英语解答

I cleaned my classroom _____ A.with there hours B.three hours ago C.in there hours D.there hours be

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解答

B
C项 in+时间一般表示未来要做的事情,比如：I will be there in 2 minutes.（我两分钟内会到）
由题干“cleaned”知是过去式,故只有B项合适.