问题
选择题
You ______ do it if you really don't want to.[ ]
A. needn't
B. mustn't
C. can't
D. couldn't
答案
答案：A
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You ______ do it if you really don't want to.[ ]
A. needn't
B. mustn't
C. can't
D. couldn't
答案：A
