1. 高一 ( 外研版 ) 第三册 Sandstorms in Asia

2. Sandstorms have been a major disaster for many Asian countries. Scientists have tried many ways to solve this problem.And the Chinese government Is giving more attention to the problem.

3. 这张照片是 3 月 17 日由 NASA 的 OrbView-2 卫星拍摄的真彩色照片 。在照片上，沙尘已经越过黄海，到达了日本以东的太平洋上空。 事实上，这次 10 年以来中国北方最大的沙尘暴不仅仅影响了日本， 据美国国家海洋和大气局（ NOAA ）报告，这次的沙尘暴已经跨越 太平洋，于 27 日到达了美国西海岸！

4. Listen to the tape and choose the best answer 1.Sandstorms are strong winds carrying__ through the air( ) through the air( ) A.sand and dust B.rain and heat C.dirt and mud A.sand and dust B.rain and heat C.dirt and mud 2.Which of the following doesn’t belong to the main places where there are sandstorms?( ) A.Central Asia B.Central Africa C.North Europe A.Central Asia B.Central Africa C.North Europe 3.What do the experts advise people to do when a sandstorm arrives?( ) A.Don’t wear mask B.Don’t go out C.Don’t go to work as usual. A.Don’t wear mask B.Don’t go out C.Don’t go to work as usual. A C B

5. Read the passage and fill in the blanks with the words in the box Fright solve forecast get caught in 1.Scientists have tried many ways to _________this problem. 2.To have __________________a sandstorm was a terrible experience. 3.It was the most __________ and the most dangerous situation I’ve ever been in 4.The Weather Station can___________ a sandstorm some weeks before it arrives. solve been caught in frightening forecast

6. 高考链接 ：不定式的完成时表示不定式的动 作发生在谓语动词的动作之前 Eg To have been caught in a sandstorm was a terrible experience. Sandstorms in China appear to have increased in recent years. Sandstorms in China appear to have increased in recent years. ( NMET)Charles is generally considered ____ ( NMET)Charles is generally considered ____ the first computer. the first computer. A. To invent B. inventing C.to have invented A. To invent B. inventing C.to have invented (NMET)Bobert is said____abraod,but I don’t know what country he studied in. (NMET)Bobert is said____abraod,but I don’t know what country he studied in. A.To have studied B.to study C.to be studying A.To have studied B.to study C.to be studying C A

7. What’s the cause of sandstorms?

8. What caused sandstorms?  Sandstorms are caused by strong winds blowing over loose soil or sand, and picking up so much of that material that visibility is reduced. In desert regions at certain times of the year, sandstorms become more frequent because the strong heating of the air over the desert causes the lower atmosphere to become unstable. This instability mixes higher winds in the middle troposphere downward, producing stronger winds at the surface. In the United States, these events are often referred to as "dust storms". unstabletroposphereunstabletroposphere

9. Work in pairs to prepare an interview.one of the two partners acts as an interviewer,And the other is walking or driving in the sanstorm.

10. You may begin like this : What’s your opinion of the sandstorm ? It’s terrible !

11. Damage of sandstorms 1. Sandstorms can pollute the atmosphere and carry away top soil. When the top soil is carried away, on which plants grow, land becomes barren, yielding much less. 2. Also the breaking out of sandstorms brings more solid pollutants into the atmosphere and damages the environment. 3. Even sandstorms can kill people and animals and pull down buildings. In fact, sandstorms cause as much damage as typhoons and hurricanes. 3. Even sandstorms can kill people and animals and pull down buildings. In fact, sandstorms cause as much damage as typhoons and hurricanes.

12. Work in groups to discuss this question What should be done to prevent sandstorms ?

13. Since Beijing urgently needs to improve the environment to prepare for the Beijing 2008 Olympic Games, let’s write a letter to the mayor of Beijing, suggesting some ideas to prevent sandstorms. Dear Mr Wang, I’m a middle school student.I want to give some Ideas to prevent sandstorms………

14. Thank you