Question

--- You don't look well. What's the matter, Jack?

--- Last night I watched the football match and didn't go to bed ________ midnight.

1. A.
   while
2. B.
   when
3. C.
   until
4. D.
   since

Answer 1

C
while和when后接表示一段的时间状语从句，两者可通用，而since是“自从……”的意思，后接时间上的一点，since midnight自从半夜以来，用在此句中不合题意。所以只能选C答案。until与句中的not一起构成词组not... until (直到……才) 。全句译为：昨晚我看足球赛直到半夜才睡觉。