——Did Jack e back early last night?
——Yes. It was not yet eight o’clock he arrived home.
A. before
B. when
C. that
D. until
网友回答
A. before
(答案→)B. when
C. that
D. until
解析：句意：--杰克昨晚回来早吗？---是的，当他回来时 时间还不到八点。这里用when引导时间状语从句，it指时间，注意这句话不是强调句型 如果是强调句型 时间前应加介词at（It was at 8 o’clock that he arrived）故C 错。如果用before 必须是时间段 如 It was eight hours before he arrived八小时后他到了。也不是not until 句型 该句型一般强调主语的动作 如 He didn't arrive until eight! 他直到八点才到！选B。