—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(dòng)詞時(shí)態(tài)。根據(jù)語(yǔ)境“我不能出去游泳，（因?yàn)椋┪椰F(xiàn)在正在為我媽媽做家務(wù)。”后有now.故用現(xiàn)在進(jìn)行時(shí)。選A。
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