Question

【题目】The thought of going back home was all ______ kept him happy while he was working abroad.

A.whichB.whereC.howD.that

Answer 1

【答案】D

【解析】

考查定语从句。句意：在国外工作时，回家的想法是唯一让他高兴的事。分析句子可知，all是______ kept him happy的先行词，当先行词是all时，从句的连接词只能用that。故选D。