---Mum, could I play with my classmates for a while after I finish my homework?---_______. But you must e back before supper.A.Yes, you canB.Yes, you couldC.No, you can’tD.No, you couldn’t
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A解析本题答语的含义是晚饭前你必须回家,根据答句的含义应该是对问句的肯定,could构成的的一般疑问句,回答是不在拥有委婉礼貌的语气,不在用could,而应该用can,故本题选A。