Question

【题目】Ben stayed up late to watch the football match. He didn’t go to bed ________ it was 3:00 a.m.

A. until B. since C. unless D. if

Answer 1

【答案】A

【解析】句意：本为了看那场足球比赛熬夜很晚。他直到凌晨3点才去去睡觉。until直到；since自从；unless如果不，除非；if如果。not……until……“直到……才……”，故选A。