◎ 题干
My mother is always warning me when I go out, "Don't get off the bus ________ it is stopping."
[     ]
A. until  
B. before
C. while  
D. after
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“My mother is always warning me when I go out, "Don't get off the bus ________ it is stopping."[ ]A. untilB. beforeC. whileD. after…”主要考查了你对  【并列连词】  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。