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—What’s your mother__________ now？
—She’s __________ our house.
A．doing, clean B．do; clean
C．does; cleans D．doing; cleaning
D

試題分析：句意：——現(xiàn)在你的母親正在干什么？——她正在打掃我們的房間。有時(shí)間副詞now來修飾，此處用現(xiàn)在進(jìn)行時(shí)，故選D。
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