问题
单项选择题
— May we leave the classroom now
— No, you ______. You ______ to leave until the bell rings.
A. needn’t ; are allowed
B. don’t have to; are supposed
C. mustn’t ; aren’t allowed
D. can’t ; aren’t supposed
答案
参考答案:C
解析:[专家点评] 问句是以:May引导的,故答语不能用B、D项,答语中第二句句意为:“铃响了你们才能离开”,此处用短语“not…until”表示“直到……才”,故C项为正确答案。