______in the dark, his head bumped against the wall.

admin2013-09-28  26

问题 ______in the dark, his head bumped against the wall.

选项 A、When he was walking
B、When walking
C、Walking
D、While walking

答案A

解析 状语从句题。各选项中的walk和主句主语his head没有任何逻辑关系,因此在此处不能使用walk的非谓语形式,也不能使用while+-ing形式作状语,否则就形成了垂悬结构。因此,此处只能使用when引导的状语从句,答案为A。
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