I met a friend of mine I was walking along the street.A. beforeB. asC. becauseD. since

发布时间：2020-08-22 19:50:30

I met a friend of mine      I was walking along the street.          
A. before
B. as
C. because
D. since

网友回答

A. before
(答案→)B. as
C. because
D. since
解析：before在……之前； as随着，当……时；because因为；since由于，自从……以来。句意：当我在大街上散步时，我遇到了我的一个朋友。结合语境可知选B。
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