—Shall we go out for a swim?
—Sorry, I can’t. I ______ housework for my mother now.
A．a(chǎn)m doingB．is doingC．a(chǎn)re doingD．did
A
考查動詞時態(tài)。根據(jù)語境“我不能出去游泳，（因為）我現(xiàn)在正在為我媽媽做家務�！焙笥衝ow.故用現(xiàn)在進行時。選A。
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