【阅读理解】Two United Nations agencies warned on Tuesday that children are most at risk of developing skin cancers as a result of the long-term decline in the earth's protective ozone layer. The agencies, the World Health Organization(WHO)and the UN Environmental Programme(UNEP), issued the warning as they launched a global programme aimed at alerting schools to the dangers of exposure to the sun.

　　Why does the risk of developing skin cancers in children become greater and greater

　　A、Because they pay little attention to their skin health.

　　B、Because they are short of physical training.

　　C、Because the earth's protective ozone layer declines year after year.

　　D、Because the earth is getting warmer and warmer.

　　正确答案： C

　　答案解析： 答案选C。本段第一句就说到，由于地球起保护作用的臭氧层一直缩小，因此儿童发生皮肤癌的危险性增大，故C项应是最佳答案。

　　【阅读理解】Young musicians in African countries are creating a new kind of pop music. The tunes and the rhythms of their music combine African traditions with various forms of music popular today, such as hip-hop, rap, rock, jazz, or reggae. The result is music that may sound familiar to listeners anywhere in the world, but at the same time is distinctly African. It is different also in another way Many of the songs are very serious and they deal with important social or political issues in Africa today.

　　This passage is about how African pop music is_______.

　　A、usually about love and romance

　　B、more serious than most pop music

　　C、popular with young people in Africa

　　D、mostly written just for entertainment

　　正确答案： B

　　答案解析： 答案选B。本题的问题是：非洲流行音乐的不同之处是什么?由本段倒数第一句可以得出答案。“It is different also in another way Many of the songs are very serious and they deal with important social or political issues in Africa today.” AD项错误，C项未提及。

　　【阅读理解】“Longer life would give us a chance to recover from our mistakes and promote long term thinking,” says Dr Gregory Stock of the University Of California School Of Public Health. “It would also raise productivity by adding to the year we can work.”

　　Longer lives don't just affect the people who live them. They also affect society as a whole. “We have war, poverty, all sorts of issues around, and I don’t think any of them would be at all helped by having people live longer,” says US bioethicist Daniel Callahan. “The question is ‘What will we get as a society’s suspect it won’t be a better society.”

　　Which of the following is NOT mentioned as one of the things that living longer might enable an individual to do

　　A、Spending more time with his family.

　　B、Having more education.

　　C、Realizing more dreams.

　　D、Working longer.

　　正确答案： B

　　答案解析： 答案选B。长寿使个人能做的事主要在以上两段里讲到，作者没有提到长寿可以让人更多地接受教育。