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
A
主语从句she couldn’t understand缺少宾语,要用what引导。表语从句“fewer and fewer students showed interest in her lessons”是一个完整的句子,要用why引导,意思是“为什么越来越少的学生对她的课感兴趣”。