题目内容
Nowadays scientists are working hard to find out ______ to do with air pollution.
A. howB. whyC. whenD. what
D
【解析】
试题分析：句意：现在科学家们正在努力找出做什么可以解决空气污染问题。how怎么； why为什么； when何时； what什么。所以选D。
考点：考查疑问词。
Complete the following passages with the words or phrases in the box. Each word or phrase can only be used once (将下列单词或词组填入空格。每空格限填一词，每词或词组只能填一次): (共8分)
A. looking forward to B. expect C. usually D. root E. such as |
The meaning of the word “volunteer” may be a little different in different countries, but it
1. means “one who offers his or her services.” There are many different ways in which people can volunteer, 2. taking care of sick people, working in homes for homeless children, and picking up garbage from beaches and parks. Voluntee
rs may work within their own countries or in other c
ountries. They are often people with a strong wish to help those who are less fortunate than themselves. Volunteers don’t 3. any kind of pay.
At the 4. of volunteering is the idea that one person may have the ability to offer services that can help other people. Tracy, a good friend of mine, however, recently 
came back from India with a new idea of what being a volunteer means. She worked for two and a half weeks in one of Mother Teresa’s homes in Calcutta. The following is her story.