问题
选择题
-May I watch TV now, Mum?
-No, you_______. You_______ do your homework first.
A. don't; must B. don't; can't C: can't, must D. can't; can
答案
答案：C
题目分析：句意：现在我可以看电视吗，妈妈？不，你不能。你必须先做你的家庭作业。对may开头的问句回答，否定形式常用can’t。所以选C。
