题目内容：
At a time when Internet use is expanding rapidly, social critics say the technology could _______ the fragmentation of U.S. society or help to fuse it, depending on how it is used.
参考答案：
答案解析：
单选题：At a time when Internet use is expanding rapidly, social cri
- 题目分类：GRE
- 题目类型：单选题
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