问题补充:
---Mum, could I go shopping with you?
--- Yes, . But you have to finish your homework first.
A. you can
B. you could
C. you can’t
D. you couldn’t
答案:
(答案→)A. you can
B. you could
C. you can’t
D. you couldn’t
解析:句意:妈妈,我可以和您一起去购物吗?可以,但是你必须先完成你的作业。could在此处表示委婉的语气,与时态无关,所以回答时还是用can,故选A。