当前位置：单选题 When stopped at a roadside hot dog stand, an airplane flew over our heads with such a deafening roar that we almost choked on the sodas we were drinking.
A.While stopped
B.While stopping
C.As we stopped
D.As stopped
正确答案： C
答案解析: 本题重点考查状语从句的用法。状语从句由连词引导，有完整的主谓结构，与主句相比，其处于从属地位。画线部分是由when引导的从句，但从句中没有主语，因而是错误的。四个选项中首先可以排除A和D,它们的错误与画线部分一样。B中使用了现在分词，但其逻辑主语与句子主语却不一样，也不能选它。只有C是由连词as引导的一个有完整主谓结构的句子，故选C。
相关知识：一、词汇和语法
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