问题描述：
一道单项选择英语题~~~~~~~~~
---Mom,I want to play football.
---NO,you ____stop unless you finish your homeworkfrist.
A.don't have to
B.mustn't
C.not have to
D.have to not
选哪个?
---Mom,I want to play football.
---NO,you ____stop unless you finish your homeworkfrist.
A.don't have to
B.mustn't
C.not have to
D.have to not
选哪个?
问题解答：
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