2. 外语
  3. If there is one thing that could halt the ascent of social networks, it is the thorny question of privacy. This is【C1】______beca

If there is one thing that could halt the ascent of social networks, it is the thorny question of privacy. This is【C1】______beca

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问题     If there is one thing that could halt the ascent of social networks, it is the thorny question of privacy. This is【C1】______because it goes right to the heart of the social-networking business model. In order to【C2】______users, sites need to offer ways for members to restrict the information about themselves that gets shared with a wider【C3】______. But if a site allows members to keep too much of their information private, there will be less traffic that can be turned into profit【C4】______advertising and various other means,【C5】______the network’s business will suffer.
    There is some evidence that people are starting to become more sophisticated about the way in which they【C6】______their data, which could have longer-term【C7】______for the networks’ growth. Research【C8】______last year showed that some 60% of adults are restricting【C9】______to their online profiles.
    As it happens, the social networks have partly brought this on themselves. In order to offer a better service, many have created【C10】______sets of privacy controls that allow users to switch【C11】______different levels of protection to entrench (保护) their online data. Facebook has excessive controls that can be【C12】______to create different levels of confidentiality. Default settings (默认设置) for younger people on social-networking sites are often more【C13】______than those for adults to ensure they are protected【C14】______unwanted attention.
    Social networks【C15】______applause for developing these fine-grained controls.【C16】______their desire for profit can put them on a【C17】______course with privacy activists, regulators and their users. One bone of contention is social networks’【C18】______to draw attention to their privacy statements. The reason for this might be【C19】______about "privacy reassurance": the worry that alerting people to privacy as a potential issue will make them less inclined to share things,【C20】______robust privacy controls are available.
【C8】
选项 A、collected
B、guided
C、discovered
D、published
答案D
解析 语义衔接题。分析句子结构可知，69 last year作Research的后置定语，再结合选项均为过去分词可知，Research与所填词构成被动关系，作所填词的宾语，能与Research构成合理动宾搭配且符合语境的只有[D]published“发表”，用在此处表示去年发表的研究，故答案为[D]。[A]collected“收集”：[B]guided“引导；指导”；[C]discovered“发现”。
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