—Shiyan is trying to build the civilized city(文明城市).—Yes, when we cross the street we must wait ________ the traffic li

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1. (2018八上·十堰期末) —Shiyan is trying to build the civilized city(文明城市).
—Yes, when we cross the street we must wait ________ the traffic lights turn green.

A . until B . as long as C . as soon as D . if

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湖北省十堰市2017-2018学年八年级上学期英语期末调研考试试卷