—Must we wear our school uniform this af
题型：选择题
问题：
—Must we wear our school uniform this afternoon?
—No, you _____. All of us will go on an outing.[ ]
A. mustn't
B. can't
C. needn't
D. couldn't
—Must we wear our school uniform this afternoon?
—No, you _____. All of us will go on an outing.[ ]
A. mustn't
B. can't
C. needn't
D. couldn't