-MustIsendmyuncleane-mailnow,Dad?  -No,you

问题详情：

  -Must I send my uncle an e-mail now, Dad?

   -No, you ________ do that after you finish your homework.

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

【回答】

C

知识点：情态动词

题型：选择题