问题
选择题
_____ to school this morning, I met a friend of mine.
A．I was walking
B．Walking
C．While I walking
D．Walked
答案
答案：B
考查非谓语动词。Walk和逻辑主语I是主谓关系，要用Walking；如果选A，两个句子之间要加连词；而C应是While I was walking。所以选B。
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