--- 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 |
--- 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 |
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