一道高中英语选择题(you must do )-Tom, you must do as you're told to.-Oh , I must, ___ I?A.mustB.shouldC.needn'tD.mustn't答案是什么?为什么?谢谢

一道高中英语选择题(you must do )-Tom, you must do as you're told to.-Oh , I must, ___ I?A.mustB.shouldC.needn'tD.mustn't答案是什么?为什么?谢谢
一道高中英语选择题(you must do )
-Tom, you must do as you're told to.
-Oh , I must, ___ I?
A.must
B.should
C.needn't
D.mustn't
答案是什么?
为什么?
谢谢

一道高中英语选择题(you must do )-Tom, you must do as you're told to.-Oh , I must, ___ I?A.mustB.shouldC.needn'tD.mustn't答案是什么?为什么?谢谢
A

选D
反意疑问句要根据前句的动词，前句用must,后句也用must,排除B,C
另外，根据“前肯后否，前否后肯”的原则，排除A

D肯定是错误的，因为它是表示禁止，不可以。表示没必要做什么的时候应该是用needn't 或者 don't have to

C 反义疑问句，前面must解释为必须时，后面一定要接needn't 的，因为must解释为必须时的否定为needn't 。
但是当must解释为推测，既一定时要用mustn't 来做反义疑问句

c 。固定搭配。 反义疑问句，前面must时，后面一定要接needn't 的。固定搭配要记得。