__Lily___Lucy may go with you because one of them must stay at home.

问题描述:

__Lily___Lucy may go with you because one of them must stay at home.
A.Both,and
B.Either,or
C.Neither,nor
D.Not only,but also
选哪个,为什么呢?

B
看后面句的意思是其中一个人必须呆在家里,所以只有其中的一个人去了.
A,两个都去 B,或者,要么.要么
C,两个都不 D,不但.而且