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
出自：英语2（本）
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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
出自：英语2（本）