The thought of going back home was ----------kept him happy while he was working abroad

问题描述:

The thought of going back home was ----------kept him happy while he was working abroad
A that
B all that
C all what
D which
请说明理由

B 首先主句缺少was的表语,因此all不能少,其次连接后面的定语从句的应为that或which,修饰all,所以选择B还有一种说法,但是这里没有选项符合:The thought of going back home was what kept himhappy while he was wor...