Question

when he waswalking in the dark his head

_____ in the dark, his head hit against a tree. A．Walking B．He was walking C．Walked D．When he was walking

Answer 1

D 考查从句。当分词做状语时，和主句的主语有一定的逻辑关系。主句的主语是his head和walk无逻辑上的关系，一个句子中也不能有两个主语。故选D，当他正走在黑暗中时，他的头撞到了树上。