____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?

____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?
____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?

____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.

D
她无法理解几乎没有学生对她的课感兴趣

A
2楼的语法解释很好
但是题干似乎有问题，句中的"and"很多余，讲不通