-MustIfinishtheexerciseatschool?   -No,youdon'thaveto....

问题详情：

 -Must I finish the exercise at school?

    -No, you don't have to. You _______ do it at home.

    A. must              B. need               C. will                D. can

【回答】

D

知识点：情态动词

题型：选择题