May we leave the classroom now/ No,you _____.You ____to leave until the bell rings A:mustn't are allowed B:don't have to are supposed C:needn't aren't allowed D:can't aren't supposed 怎么填 要详细的理由奥 准确点奥
A 翻译如下 我们可以离开教室了么? 不,不能.你们在铃响之后才能离开 may I 开头的疑问句,否定回答用you can't或you mustn't ,一般不用No.you may not.因为比较生硬. must I开头的疑问句,否定回答用you needn't 肯定的回答为 : Yes,you may.Yes,you must. 如果是D翻译就是你知道铃响不应该离开 显然意思反了