—MayIplaycomputergames?—No,you

问题详情：

—May I play computer games?

—No, you __________. You __________finish your work first.

   A. may not; may     B. can’t; must      C. needn’t; may       D. mustn’t; may

【回答】

B 

知识点：情态动词

题型：选择题