◎ 题干
— Hurry up,. The bus is coming.      
— Oh, no. we mustn't cross the street ________ the traffic lights are green.    
[     ]
A. after  
B. since    
C. while    
D. until
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— Hurry up,. The bus is coming. — Oh, no. we mustn't cross the street ________ the traffic lights are green.[ ]A. after B. sinceC. while D. until…”主要考查了你对  【从属连词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。