—MustIfinishwritingthereporttoday?  —No.You

问题详情：

—Must I finish writing the report today?

   —No. You _______ if you have something else to do.

  A. can't                 B. couldn't                 C. mustn't                D. don't have to

【回答】

D

知识点：情态动词

题型：选择题