宾语从句,the thought of going back home was ___ kept him happy while he was working aboradAthat Ball that Call what Dwhich选什么呀,为什么呢?

宾语从句,the thought of going back home was ___ kept him happy while he was working aboradAthat Ball that Call what Dwhich选什么呀,为什么呢?
宾语从句,
the thought of going back home was ___ kept him happy while he was working aborad
Athat Ball that Call what Dwhich
选什么呀,为什么呢?

宾语从句,the thought of going back home was ___ kept him happy while he was working aboradAthat Ball that Call what Dwhich选什么呀,为什么呢?
选B吧
"___ kept him happy while he was working aborad "
是从句
而从句中又缺少一个主语
所以之能用WHAT了
其它选项不能充当成份的

b The thought of going back home was all that kept him happy while he was working aborad .这不是宾语从句。而是定语从句。