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单选题

    The Internet affords anonymity to its users, a blessing to privacy and freedom of speech. But that very anonymity is also behind the explosion of cyber-crime that has (1)_____ across the Web.

    Can privacy be preserved (2)_____ bringing safety and security to a world that seems increasingly (3)_____?

    Last month, Howard Schmidt, the nation’s cyber-czar, offered the federal government a (4)_____ to make the Web a safer place—a “voluntary trusted identity” system that would be the high-tech (5)_____ of a physical key, a fingerprint and a photo ID card, all rolled (6)_____ one. The system might use a smart identity card, or a digital credential (7)_____ to a specific computer, and would authenticate users at a range of online services.

    The idea is to (8)_____ a federation of private online identity systems. Users could (9)_____ which system to join, and only registered users whose identities have been authenticated could navigate those systems. The approach contrasts with one that would require an Internet driver’s license (10)_____ by the government.

    Google and Microsoft are among companies that already have these “single sign-on” systems that make it possible for users to (11)_____ just once but use many different services.

    (12)_____ , the approach would create a “walled garden” in cyberspace, with safe “neighborhoods” and bright “streetlights” to establish a sense of a (13)_____ community.

    Mr. Schmidt described it as a “voluntary ecosystem” in which “individuals and organizations can complete online transactions with (14)_____, trusting the identities of each other and the identities of the infrastructure (15)_____ which the transaction runs”.

    Still, the administration’s plan has (16)_____ privacy rights activists. Some applaud the approach; others are concerned. It seems clear that such a scheme is an initiative push toward what would (17)_____ be a compulsory Internet “driver’s license” mentality.

    The plan has also been greeted with (18)_____ by some computer security experts, who worry that the “voluntary ecosystem” envisioned by Mr. Schmidt would still leave much of the Internet (19)_____. They argue that all Internet users should be (20)_____ to register and identify themselves, in the same way that drivers must be licensed to drive on public roads.

(11)

A
carry on
B
linger on
C
set in
D
log in
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答案:

D

解析:

答案精析:第二个that引导的定语从句修饰systems,其含义与前置定语single sign-on(单点登录)一致,即用户只需登录一次,就可以使用多种服务,once与single对应,空处所填词应与sign-on(登录)含义一致,故D选项为正确答案。

错项排除:carry on后面需要接宾语,原句空后没有宾语,故A选项错误。B选项带入原文语义不通,故错误。C选项通常指不好的事情,故排除。

长难句分析:Google and Microsoft are among companies that already have these “single sign-on” systems that make it possible for users to log in just once but use many different services.

本句主干为Google and Microsoft are among companies,是主系表结构。第一个that引导的定语从句that already… systems修饰先行词companies。第二个that引导的定语从句that make it…services修饰先行词systems,其中使用了it充当make的形式宾语,真正的宾语是由并列连词but连接的两个不定式to log in和(to) use。

句意为:谷歌和微软等公司已经拥有“单点登录”系统,该系统中用户只需登录一次,就可以使用多种服务。

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