— Hey, boy. You can’t cross the street now. You have to wait _______ the traffic lights turn green. ...
2023-01-16 18:40:06 56次 2014-2015学年重庆沙坪坝九年级上期中英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
— Hey, boy. You can’t cross the street now. You have to wait _______ the traffic lights turn green.
— Oh, sorry and thank you.
A. when B. until
C. while D. after
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