Question

【题目】—It's too late. I have to go now.
—Oh, it's raining outside. Don't leave _________ it stops.
A.since
B.until
C.while

Answer 1

【答案】B
【解析】A. since自从，B. until直到，not ...until直到......才...... C. while当......时。句意：—天太晚了，我现在必须走。—噢，外面正在下雨。到雨停了再离开吧。故选B。