●The World Wide Web is the latest evolution of an effort to make information on computers(1)the world available to as many users as possible．
(1)A．through
B．throughout
C．by
D．with
答案：(1)C
解析：万维网是让尽可能多的人在计算机上获得信息的最新的一次努力。
●You can cut，copy，and paste information quickly by clickin9(2)bar buttons with the mouse．
(2)A．title
B．tool
C．status
D．for mula
答案：(2)B
解析：你可以使用鼠标点击工具栏上的按钮快速的剪切、复制、粘贴信息。
●A firewall is a(3)system designed to(4)all organization's network aga—inst threats．
(3)A．operating
B．programming
C．security
D．service
(4)A．prevent
B．protect
C．develop
D．exploit
答案：(3)C (4)B