问题
选择题
________ 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
答案
答案：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。