【正确答案】 C

【答案解析】[听力原文] 29-31
A study recently concluded that the public in industrialized nations are becoming more interested than before in helping the less fortunate people of developing nations. This newfound selflessness has not resulted in personal giving of money, but rather in individual efforts to give aid through service— which is far more important than money. Most volunteers have been professionals. Doctors and nurses have volunteered for medical duty, engineers for building roads and bridges, and teachers and others have made themselves available for a variety of international assignments.
It is not clear why this phenomenon is taking place. There has been consideration that international developments in recent years have weakened nationalism and have emphasized importance of all humanity working together for a better world.
29．What is the subject of this talk?
[试题分析] 本题考查考生对全篇中心意思的把握。efore in helping the less fortunate people，newfound selflessness， volunteers，emphasized the importance of all humanity working together for a better world．
[详细解答] 本文第一句及最后一句是找到本题答案的关键。文章开始告诉我们，最新研究表明，工业国家的公众较以前对帮助发展中国家的不幸的人们更感兴趣。而这种无私(selflessness)的表现不是拿钱出来，而是个人努力通过服务来给予帮助，那比钱更重要，文章细而举例说明人们如何在国际事务中提供个人服务。文章最后一句则告诉我们：最近几年的国际发展是减弱民族主义(weaken nationalism)而强调全人类共同为美好世界而努力的重要性。另外，通过newfound selflessness及volunteers 等字眼，考生可猜出答案。

【正确答案】 C

【答案解析】[听力原文]
What kind of volunteering is discussed?

[试题分析] 本题考查考生对细节信息的掌握。
[详细解答] 从所列关键词，可知本题答案为C。而且本句后所列志愿者如医生、护士、工程师、教师均是专职人员。

【正确答案】 D

【答案解析】[听力原文]
What reason for volunteering is given?

[试题分析] 本题考查考生对某一现象产生原因的分析能力。
[详细解答] 句子“It is not clear why this phenomenon is taking place”表明这种现象产生的原因不清，但转而说"there has been consideration that…”道出来的原因就是民族主义的减弱，而强调全人类共同努力重要性的强调。本题可采取排除法，选项A、B、C均不符合文中最后两句，故选D。