题目内容
—May I swim in the lake, Dad?
—No, you _______. Look! Here is a notice "No swimming!"
—No, you _______. Look! Here is a notice "No swimming!"
[ ]
A. may not
B. mightn't
C. mustn't
D. needn't
B. mightn't
C. mustn't
D. needn't
C
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