—Did you stay up late last night?—Not very late. It was half past elevenI went to bed.A. t

问题补充：

—Did you stay up late last night?

—Not very late. It was half past elevenI went to bed.

A. that

B. when

C. before

D. since

答案：

A. that

(答案→)B. when

C. before

D. since

解析：考查时间状语从句。“昨天你熬夜太晚么？”“不太晚，我睡觉时十一点半”选B