单选题 By saying"...owners of well over half of all World Wide Web sites have set up home with out fitting locks to their doors" (Line 3-4, Para.2), the author means that______.

A、 those happy times appear still to be with us
B、 there simply wasn't any crime to worry about
C、 many sites are not well-protected
D、 hackers try out tricks on an Internet site without actually breaking in

【正确答案】 C

【答案解析】词汇语义题。对于这一题，如果仅读了句子所在的上文内容而不关注后面讲的什么，就很容易错选其他选项，联系下文不难判断出作者说这句话的用意是说明许多网站不安全。