Question

________ she couldn’t understand was ________ fewer and fewer students showed interest in her lessons.

A．What；why

B．That；what

C．What；because

D．Why；that

Answer 1

A

考查名词性从句。what she couldn’t understand是主语从句，what引导这个主语从句并在句中作宾语。后面是一个表语从句，句子结构很完整所以应该使用连接副词，再从句意考虑，使用why。句意：她不能理解的是为什么越来越少的学生对她的课感兴趣。