问题补充:
--- Did your father come back early last night?
--- Yes. It was not yet eight o’clock he arrived home.
A. before
B. when
C. that
D. until
答案:
A. before
(答案→)B. when
C. that
D. until
解析:这是一组对话。上文,昨天晚上,你的父亲回来得早吗?下文,当他到达家的时候,时间还不到8点。通过分析句子结构,可知这里包含一个时间状语从句,表示“当……时候”,故用when。