【题目】 It was when we were returning home _____ I realized what a good feeling it was to have helped someone in trouble.
A. which B. that C. where D. how
在线课程【答案】B
【解析】
试题分析：考查强调句。句意：当我们返回家时，我意识帮助他人的这种快乐的感觉。It was +强调部分+that。。，本句话中强调时间状语when we were returning home，故选B项。
考点 : 考查强调句