题目内容：

.No one knows about what they are doing,__?A:does she B:do they C:don't they
D:doesn't he.选哪个.请说明理由或过程谢谢.

优质解答

B当主语是everybody,everyone,anybody,anyone,somebody,someone,nobody,no one,none,neither时,反意疑问句的主语要用复数代词they.如：None is here,are they?没有人在这儿,对吗?Everyone knows about it,don’t the...