【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】考查動詞時態(tài)。句意：——母親在哪里？——她在廚房里。一上午她都在做家務。現(xiàn)在仍在廚房做，故應用現(xiàn)在完成進行時，表示從過去至今一直在持續(xù)的動作。關(guān)鍵詞是：all morning。故選D。

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