【題目】—Where is Mother?
—She is in the kitchen. She ______ the housework all morning.
A.is doing
B.was doing
C.has done
D.has been doing

【答案】D
【解析】考查動(dòng)詞時(shí)態(tài)。句意：——母親在哪里？——她在廚房里。一上午她都在做家務(wù)�，F(xiàn)在仍在廚房做，故應(yīng)用現(xiàn)在完成進(jìn)行時(shí)，表示從過(guò)去至今一直在持續(xù)的動(dòng)作。關(guān)鍵詞是：all morning。故選D。

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