阅读短文，选出选项问题。 BEUING-No Car Day was first started by 34 cities in France on September 22, 1998. It was started to protect the environment. By now more than l, 000 cities around the world have had a No Car Day. The first No Car Day in China was in Chengdu in 2001. Other cities, including-Taipei, Shanghai and Wuhan, also support(支持)the day. In Beijing, more and more people are joining in the ac- tivity. It asks drivers to leave their cars at home for one day each month and walk or ride a bike to work. It also calls on Beijingers not to use cars on June 5 (World Environment Day). The slogan(口号) for the day is,  'If we drive for one less day, we can have one more nice day. 'So far, more than 200, 000 drivers have shown their support. 'We can't control the weather, but we can choose not to drive, ' said Wu Zonghua,  a car club chairman. Beijing is trying to have 238 blue sky days this year. In the first quar- ter of this year, Beijing only had 52 blue sky days. This was 11 days less than the number for the same period last year. Much of the dust (灰尘) comes from the desert (沙漠),  but cars cause most of the air pollution(污染). We must do more for No Car Day. 1. There are _____ cities in China that support No Car Day according to the passage. A. three B. four C. five D. six 2. The activity of No Car Day encourages Beijing drivers _____. A. not to work on No Car Day B. to enjoy having a day off C. to leave their cars at home for repair D. to ride a bike or walk instead of driving to work 3. According to the passage there were _____ blue sky days in the first quarter of last year in Beijing. A. 52 B. 63 C. 41 D. 238 4. The air pollution in Beijing is mostly caused by _____. A. cars B. dust C. weather D. rubbish 5. We can know from the passage that . A. more and more people in Beijng are joining car clubs B. people will have one more World Environment Day each month C. more and more people won't drive on No Car Day in Beijing D. more people in the world won't drive any more