【題目】---How clean the bedroom is! ---Yes, I am sure that someone ______ it.

A. cleans B. cleaned C. has cleaned D. is cleaning

【答案】C

【解析】句意:——臥室多干凈!——是的,我肯定有人把它打掃過(guò)了?疾閯(dòng)詞時(shí)態(tài)辨析題。根據(jù)句意和語(yǔ)境,可知對(duì)句需用現(xiàn)在完成時(shí)態(tài);因?yàn)?/span>someone是三單人稱(chēng),需借助has+過(guò)去分詞構(gòu)成完成時(shí),故選C。

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