She glanced about now and then____to make sue she was not being followed.

问题描述:

She glanced about now and then____to make sue she was not being followed.
A so that B as though C even if D in case请问为何要选B?是不是省略了什么成份啊!

省略了she ,因为从句的主语和主句是一样的
as though she want to make sure she was not being followed
意思是好象她想要确认没有被人跟踪.