【題目】--- How clean the bedroom is!

--- Yes, I am sure that someone it.

A. cleans B. cleaned C. has cleaned D. had cleaned

【答案】C

【解析】句意：——那間臥室多么干凈�。　堑�，我確信某人已經(jīng)打掃它了。根據(jù)How clean the bedroom is!可知現(xiàn)在臥室是干凈的，因此是已經(jīng)打掃過(guò)的，對(duì)現(xiàn)在造成了影響，故用現(xiàn)在完成時(shí)，故選C。

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