题目内容

—Shall we go out for a swim?
—Sorry, I can’t. I ______ housework for my mother now.
A．am doingB．is doingC．are doingD．did
A
考查动词时态。根据语境“我不能出去游泳，（因为）我现在正在为我妈妈做家务。”后有now.故用现在进行时。选A。
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