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高三英语复习题2Did jack come back early llast night?yes,it was not

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高三英语复习题2
Did jack come back early llast night?
yes,it was not yet eight o'clock_____he arrived home.
A before B when C that D until
正确答案是B.为什么是B?A错在哪里?不是说IT be +时间点+ before"表示"在××××× 之前,时间是××××××
高三英语复习题2Did jack come back early llast night?yes,it was not
用before的话必须是表示一段时间啊!
8o`clock是一个时间点而已