( )I take some photos in the hall?no,you( )A Can neednot B must mustnot Ccould cannot

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()Itakesomephotosinthehall?no,you()ACanneednotBmustmustnotCcouldcannot()Itakesomephotosinthehall?no,

( )I take some photos in the hall?no,you( )A Can neednot B must mustnot Ccould cannot
( )I take some photos in the hall?no,you( )A Can neednot B must mustnot Ccould cannot

( )I take some photos in the hall?no,you( )A Can neednot B must mustnot Ccould cannot
-- (Could) I take some photos in the hall?
-- No,you (cannot).
我可以在大厅拍照吗?不可以.
问句用could来向对方询问允许,回答用can't表示不行.
need表示“需要”,mustn't表示“禁止”.它们的语气和意思都不合适.

选C
B是排除的,千万别拍照是mustn't的意思,这个意思上解释不过去
A错了,我能拍照吗?不,你不需要,回答的对不上前面的
只有C了,C是对的

Can 的否定回答用must
could 更柔和的问,可以用can
must 提问意思就是:“我一定要做****的事吗?
选C