—LastnightIwatchedthefootballmatchanddidn'tgotobed___12o'clock.
—LastnightIwatchedthefootballmatchanddidn’tgotobed____12o’clock.(2002黄冈市)
A.whenB.untilC.asD.while为什么要选B而不是A呢?求解析,谢谢