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