Question

   People usually check whether their keys,wallets and phones are with them before going out. But many people in Chiga,now have one more important thing to take,a face mask (面罩) . They hope that it can protect them from the pointed air. 

   Since the end of last year,many cities in China have had a lot of haze (零霾) days. During these days,people can only see things that are very near to them. In Beijing,few days in January were free of smog.

    According to the Chinese Academy of Sciences,driving cars and burning coal are two major factors for PM 2.5,which is the main problem of air pollution. Poor air is harmful to people's health,especially for children and the elderly. Air problems and environmental protection have got the attention of the whole nation.

Our government is taking action to fight against pollution and offer people a healthy living environment. It calls on people to make good use of energy and cut down on energy use.

49. makes many people in China wear face masks when they go out.

   A. Water pollution   B. White pollution

   C. Air pollution   D. Noise pollution

50. Paragraph 2   tells us that on hazy days .

   A. people can't see anything

   B. there is no smog

   C. people needn’t have a mask

   D. people can't see things clearly that are far from them 

51. The Chinese Academy of Sciences said that were two important factors for PM2.5.

   A. driving cars and burning coal

   B. walking and cycling

   C. driving buses and burning wood

   D. using water and building houses

Answer 1

49. C 50. D 51. A 

[阅读C篇短文大意]中国的许多城市正在遭受严重的雾 霾天气，开车和燃烧煤炭是造成空气污染的主要因素。政府正在 采取措施控制污染，给人们提供健康的生活环境。

49. C 由第一段的最后一句"They hope that it can protect them from the polluted air"可知，答案为C.

50. D 由第二段中的” During these days,people can only see things that are very near to them”可知，在这些天，人们不能够看清 楚远处的东西。

51. A 由第三段中的"driving cars and burning coal are two najor factors for PM 2. 5"可知答案为A.