Question

--- May we leave the classroom now? --- No, you ____________ . You ____________ to leave before...

--- May we leave the classroom now? --- No, you ____________ . You ____________ to leave before the bell rings. A．mustn’t, are allowed B．don’t have to, are allowed C．needn’t, aren’t allowed D．can’t, aren’t allowed

Answer 1

D

mustn’t 语气非常重，表示“一定不要，禁止”等，一般不轻易用；can’t语气相对轻一些，常常用作may的否定；另外，当may表示推测“可能”时，其否定为：may not。跟据上文可知，D为最佳答案，不，你不能。铃响之前不许你离开。