Thethoughtofhavingabigmealathomewasall

问题详情：

 The thought of having a big meal at home was all _____ kept him happy while he was on the bus.

   A. that         B. what          C. those                D. which

【回答】

 A。先行词为all，所以只能使用关系代词that引导定语从句。

知识点：定语从句

题型：选择题