问题
选择题
—Let's go to the movies tonight.
—Sorry. I __ . I have to help my mother wash clothes. [ ]
A. mustn't
B. needn't
C. can't
答案
C
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—Let's go to the movies tonight.
—Sorry. I __ . I have to help my mother wash clothes. [ ]
A. mustn't
B. needn't
C. can't
C