问题补充:
--- Mum, could I play with my classmates for a while after I finish my homework?
--- . But you must come back before supper.
A. Yes, you can
B. Yes, you could
C. No, you can’t
D. No, you couldn’t
答案:
(答案→)A. Yes, you can
B. Yes, you could
C. No, you can’t
D. No, you couldn’t
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。