_________ across the railway, a train hit it.A．While walkingB．Walking slowlyC．As
题型：不详难度：来源：
_________ across the railway, a train hit it.| A．While walking | B．Walking slowly | | C．As the little pig walking | D．While the little pig was walking |
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答案
| D |
解析
试题分析：考查句子结构：逗号后面是简单句，主语是a train，A项用的是状语从句的省略式，只有主语一致的时候，才能省略从句的主语和be动词，但是这两句话的主语不一致，A是错的，如果用非谓语作状语的时候，应该非谓语的逻辑主语是a train，而B项walking的逻辑主语是人，所以也不对，C用的是as引导的时间状语从句，但是句子缺少be动词，所以选D。句意：当小猪穿越铁轨的时候，一辆火车撞到它。选D。 |
举一反三
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