Question

4．Public service advertising is designed to inform the public on issues that are frequently considered to be in the general best interests of the community at large．Typically，it reflects a political viewpoint，philosophical theory，religious concept or humanitarian notion（观念）．It is also commonly referred to as a public service announcement （PSA）or a community service announcement （CSA）．The ads are usually broadcast on radio or television，buy may also appear in newspapers or magazines．They are common in industrialized counties throughout the world．
PSAs are commonly aimed at changing public attitudes by raising consciousness about particular issues．Health，conservation and safety themes are popular in many PSAs．The public service advertising campaigns are often sponsored by trade associations，civic organizations，non-profit institutions or religious groups．
Most public service advertising involves joint efforts of the private and public sectors．Non-profit groups and government agencies commonly team up with private mass media，promotion and advertising firms to produce spots for radio，television and print media．Most commonly，the non-profit agency creates the message and an advertising firm develops the campaign，polishes it to meet industry standards and plans its distribution，all free of charge．Television and radio stations usually broadcast these ads at no charge，and magazines and newspapers customarily publish them for free as well．
In recent years，it has become commonplace for U．S．television stations to feature public service advertising spots immediately following a broadcast that has focused on an issue considered sensitive and of concern to many members of the general public．These PSA broadcasts generally offer addresses，websites and toll-free telephone numbers for information sources．Some of the topics focuse4d on in the PSAs have included child abuse，AIDS and civil rights．

29．What's the main purpose of PSAs？C
A．To sell more products through some special ways．
B．To change consumer's attitudes through media．
C．To improve people's awareness about special issues．
D．To make more famous stars known to the public．
30．How does the author like PSAs？A
A．He thinks it good to make PSAs．
B．He is against the idea of PSAs．
C．He is curious about the idea of PSAs．
D．He thinks PSAs are completely to make money．
31．What can we learn from the passage？C
A．Most of the PSAs are made by the government．
B．PSAs will make big profits for trade associations．
C．PSAs offer various topics in many different areas．
D．PSAs are mainly broadcast on television currently．

Answer 1

分析 短文主要对PSAs（公益广告）进行介绍，包括其运转和主题等内容．

解答 29．C，细节理解题，根据句子PSAs are commonly aimed at changing public attitudes by raising consciousness about particular issues可知，PSA目的在于提到公众对某些事情的意识，故答案为C．
30．A，推理判断题，根据文章第一句Public service advertising is designed to inform the public on issues that are frequently considered to be in the general best interests of the community at large，公众服务广告目的用来告知大家最感兴趣的一些事件，可以推测作者认为PASs是好的，故答案为A．     
31．C，细节理解题，根据句子Health，conservation and safety themes are popular in many PSAs和Some of the topics focuse4d on in the PSAs have included child abuse，AIDS and civil rights．可知，PSAs提供不同领域的很多主题，故答案为C．

点评 解答任务型阅读理解题，首先对原文材料迅速浏览，掌握全文的主旨大意．因为阅读理解题一般没有标题，所以，速读全文，抓住中心主旨很有必要，在速读的过程中，应尽可能多地捕获信息材料．其次，细读题材，各个击破．掌握全文的大意之后，细细阅读每篇材料后的问题，弄清每题要求后，带着问题，再回到原文中去寻找、捕获有关信息．最后，要善于抓住每段的主题句，阅读时，要有较强的针对性．对于捕获到的信息，要做认真分析，仔细推敲，理解透彻，只有这样，针对题目要求，才能做到稳、准．