May I take this book out of the reading room?No,you _____.You must obey the rules.A can"t B may not C needn"t D aren"t

May I take this book out of the reading room?No,you _____.You must obey the rules.A can"t B may not C needn"t D aren"t
May I take this book out of the reading room?No,you _____.You must obey the rules.
A can"t B may not C needn"t D aren"t

May I take this book out of the reading room?No,you _____.You must obey the rules.A can"t B may not C needn"t D aren"t
A can't 习惯用语,而且和后面的must形成语气呼应,彼此协调.

A can"t， 用在第二人称表示不允许，禁止

肯定是A了，先用排除法，C D选项的意思就不对了，一个是不需要，一个不是xx。再看A B A 是不能 B是不允许，咋一看题目似乎B更符合一些，但是结合英语的用语习惯，一般不会用may not这种词组来回答问题的。can 能的意思 may 允许的意思