( )so many visitors about,the dogs have to be kept in an enclosure

问题描述:

( )so many visitors about,the dogs have to be kept in an enclosure
A.with B.Having C.being D.because
为什么

( )so many visitors about,the dogs have to be kept in an enclosure
只能用A with
这里因为主句主语与前面的主语不一致,所以只能用独立主格.