____she couldn't understand was____fewer and students showed interest in her lessons.

问题描述:

____she couldn't understand was____fewer and students showed interest in her lessons.
A.What;why B.That;what C.Whta;because D.Why;that
选什么?理由?

选a,第一个空是what引导定语从句作主语,第二空填why,根据上下文,语句意思是为什么越来越少的学生对她的课感兴趣.