are you a teacher or student?我在新东方上看到这个句子 为什么teacher前面要加a 而student后面不用加呢?

are you a english teacher? Are you a teacher or engineer?A,Yes ,Im a teacher B,Im an engineer C,NO,Im an engineer D Im teacher 一Are you a student or a teacher?一(） A.Yes,一Are you a student or a teacher?一(）A.Yes,I amB.No,I am notC.I’m a student are you a teacher or student?我在新东方上看到这个句子 为什么teacher前面要加a 而student后面不用加呢? 德语怎么说you are a good teacher Are you a teacher?(否定回答） you.are.a.teacher改为一般疑问句 Are you a teacher?的回答 Excuse me ,are you a teacher? are you a teacher?哪里有错误? are you a teacher, t_ 横线 Are you a teacher now?回答 翻译Are you a teacher here? Are you a teacher做肯定回答 【英语考试】 ______ you or he the teacher of English? A. Are, B. Is说明为什么?还有and在疑问句里是变or吗?参考资料给下 Are you a boy or a girl? Are you a boy or a girl? Are you a boy or a girl