---shecouldn'tunderstandwas-A---fewerandfewerstudentsshowedinterestinherlessons
Awhatwhy
Bthatwhat
Cwhatbecause
Dwhythat
答案解析:答案A:
【What】shecouldn'tunderstandwas【why】fewerandfewerstudentsshowedinterestinherlessons
前面是连接代词what引导的主语从句,后面由连接副词why引导表语从句
中文:她无法理解的是为什么越来越少学生表现得对她上课不感兴趣