【单选题】
The addresses of webpages can be found by using the many hundreds of general and specialized search engines which provide{{U}} (42) {{/U}}to databases which hold information on them. Once a webpage has been found, hyperlinks may point{{U}} (43) {{/U}}other places of interest on the weB、Addresses of webpages also{{U}} (44) {{/U}}in other more conventional media, such as magazines, newspapers and television programs, and on posters. Webpages, in their{{U}} (45) {{/U}}, facilitate access to information made available by other{{U}} (46) {{/U}}of media, for example, collections held in libraries or programs broadcast on television.
Most webpages offer interactive opportunities which go{{U}} (47) {{/U}}merely allowing visitors freedom as to when and how they visit a page and where they might choose to go next. Feedback can be kept formal via a questionnaire which can be filled{{U}} (48) {{/U}}, or{{U}} (49) {{/U}}by providing an address for e-mail or even by installing a digital guest book for comments left for other users to reaD、Although all webpages are protected{{U}} (50) {{/U}}unauthorized visitors cannot make unsolicited changes to them, it is also possible to limit access to pages on the Internet to those holding a passworD、
B．may be linked
C．may have been linked
D．may be linking
网考网参考答案：B
网考网解析：
语法结构题。这里应使用一般现在时的被动语态，故答案为may be linked。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
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