题目内容
— Hurry up. The bus is coming.
— Oh, no. We mustn’t cross the street ________ the traffic light are green.
A. after B. while C. since D. until
D
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题目内容
— Hurry up. The bus is coming.
— Oh, no. We mustn’t cross the street ________ the traffic light are green.
A. after B. while C. since D. until
D