阅读理解。 While students in Hainan are quit

题目：

阅读理解。

    While students in Hainan are quite used to clear skies, Beijing teenagers are not so

lucky. As another warm winter approaches, the city can expect the normal clouds of smoke

caused by air pollution.

    But things could start to get better soon. The government is co-operating with a US-

based environmental protection agency to update existing buses and trucks with clean fuel

technology. The new technology could reduce air pollutants in existing diesel vehicles (柴

油机) by 40 per cent. The programme will begin by testing buses in Beijing to see if the

technology can be applied to them.

    "We encourage the development of public transportation. But at the same time we need

to reduce pollution from them," said an official.

    Efforts are being made to improve the capital's environment with tighter controls on

emissions (排放). Some heavily polluting factories and construction sites, such as those

owned by the steel giant Shougang Group, have been asked to cut production in November

and December or be closed. Beijing was the third polluted city in the world at the end of

last century, according to the UN. But thanks to recent measures, the capital has made

some progress. Last year 224 clear days were rated as having good air quality. In 1998

the air quality index (指数) gave just 100 days as good.

    "I am glad to see an improvement," said a Senior 1 boy living in the northwest of

Beijing. "Compared to other places, the air quality of Beijing is still worrying though.

I hate the pollution. Once I was riding my bike in the morning when I almost had a traffic

accident because I couldn't see a car only metres away from me in frog."

    In early October, the skies were covered by such a thick fog that a display show by

the visiting French air force was called off.

    Rapid development, industry, traffic fumes (烟) and sandstorms from the desert all

contribute to the city's bad air.

1. The passage is mainly about ______? [ ]

A. a programme to improve Beijing's air quality

B. progress made in Beijing's air quality

C. Beijing's air pollution

D. the difference between Hainan and Beijing

2. Which of the following is not the measure taken or to be taken to improve Beijing's

   air? [ ]

A. Clean fuel technology will be used in public transportation.

B. Some factories have been asked to cut production.

C. Some construction sites have been told to be closed.

D. A display show of airplanes has been called off.

3. We can infer from the passage that, with the aim of being an ecological (生态的) city

   by the 2008 Olympics, ______. [ ]

A. far more still needs to be done

B. nothing else needs to be done

C. all traffic has to be closed

D. the development of the city has to be slowed down

4. Which is not correct according to the passage? [ ]

A. Beijing's air quality is getting worse and worse.

B. Development, industry, traffic fumes and sandstorms are all the causes of bad air

   quality.

C. Clouds of smoke in the sky is the common feature in the winter of Beijing.

D. The government is making every effort to stop air pollution.