【題目】--- Look at the sweat on her face.

--- She ________ the house since she got up this morning.

A．is cleaning B．has been cleaned

C．was cleaning D．has been cleaning

【答案】D

【解析】

試題分析：本題考查時(shí)態(tài)。句中出現(xiàn)了since，要用現(xiàn)在完成時(shí)，對話發(fā)生時(shí)，說明動(dòng)作仍在延續(xù)并且可能持續(xù)下去，要用現(xiàn)在完成進(jìn)行時(shí)，故選D

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