the Internet brings much profit in, it can cause o lot of social problem.A. IfB. WhileC.

发布时间：2020-08-17 12:07:44

     the Internet brings much profit in, it can cause o lot of social problem.
A. If
B. While
C. Once
D. When

网友回答

A. If
(答案→)B. While
C. Once
D. When
解析：考查连词的辨析。依据句意来突破。从profit和problem发现前后对比转折，故选B
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