A) those happy times appear still to be with us 干擾伎倆: 答非所問+偷換范圍

　　B) there simply wasn't any crime to worry about 照抄原句 直接排除

　　C) many sites are not well-protected

　　D) hackers try out tricks on an Internet site without actually breaking in 偏離定位句子，偷梁換柱。

　　破解思路：答案推理需結合已通讀部分(第一、二段首句)和文章主線(網絡安全)。

　　對比喻的理解，找出本體和寓體，然后對照寓體的性質判斷本體的性質。千萬不能直接選擇字面意思!

　　22. SATAN, a program designed by Dan Farmer can be used ____________.

　　A) to investigate the security of Internet sites

　　B) to improve the security of the Internet system

　　C) to prevent hackers from breaking into websites

　　D) to download useful programs and information

　　對原文內容進行兩次定位，答案是對兩處信息的概括 investigative和… try out…

　　23. Farmer's program has been criticized by the public because .

　　A) it causes damage to Net browsers

　　B) it can break into Internet sites

　　C) it can be used to cause disorder on all sites

　　D) it can be used by people with evil intent

　　publicly 勉強算作一個定位提示，criticism 是關鍵。問題設置常見方式：同義替換。

　　24. The author's attitude toward SATAN is _____.

　　A) enthusiastic B) critical C) positive D) indifferent

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