课件18张PPT。tornado
hurricaneNatural Disastersearthquake sandstormlightningvolcanic eruptionModule 4 Sandstorms in AsiaNorth AmericaCentral AfricaAustralia Central AsiaBCAInner Mongolia GansuXinjiangFast reading:Para.1 a. the description of sandstorms
Para.2 b. the causes of sandstorms
Para.3 c. a major disaster in Asia
Para.4 d. the effects of sandstorms
Para.5 e. the government’s measures
Para.6 f. the forecast and suggestions Further reading:
1.?Sandstorms are strong winds carrying ____ through the air.
A. dirt and mud B. rain and heat
C. sand and dust D. cloud and snow
2.What do the experts advise people to do when a sandstorm arrives in the city?
A. Don’t go out B. Don’t wear masks.
C. Don’t go to work as usual. D. Don’t ride bicycles
3.The factors that cause land to be desert are ____.
A. cutting down trees B. digging up grass
C. climate changes D. all of the above
4. From the last paragraph, we know ____. A. the government is taking measures to prevent sandstorms.
B.?the distance between the desert and the center of Beijing is only 250 kilometers. C. more than 30 million trees have been planted in Beijing .
D. the government won’t plant trees any more in the next five years
研读:语篇理解及讲练:1)“…, a mass campaign has been started to help solve it. “
In the sentence above, “it” refers to the problem
2)研读第一段,完成“it”的词汇衔接链条:
词汇衔接: 指通过词汇选择在语篇中建立一贯穿语篇的链条,从而建立语篇的连续性。
Sandstorms _____________ _________ it 3) “The four main places in the world ( where there are sandstorms) are Central Asia, North America, Central Africa and Australia. ”
括号中的句子是什么从句?( B )
A. 地点状语从句 B.定语从句 C. 宾语从句 D.主语从句4)“…traffic moves very slowly because the thick dust makes it difficult to see.”
“traffic” means B A. 交通 B. 车辆
5) “Already the government has planted more than 30 billion and plans to continue planting for the next five yeas.” “Plans” 的词性是 B A. verb B.nounfrightening,
orange sky,
strong wind,
thick dust,
slowlydirty, breathe, mask, cycling, traffic, etc.Question: How do sandstorms affect people’s life 听录音,课文缩写填空: Sandstorms have been a major disaster for many Asian countries for centuries.
Sandstorms are strong , dry winds. The wind is sometimes strong enough to move sand dunes. “
To have been caught in a sandstorm was a terrible experience,” Ren Jianbo said.
Desertification is a process that happens because people cut down trees and dig up grass. Traffic moves very slowly because the thick dust makes it difficult to see. So weather experts advise people not to go out . To prevent it coming nearer , the government is planting trees.Discussion: 两人小组活动:以“沙尘暴”为话题采访Talk about sandstorms in pairs, You can ask the following questions:What is a sandstorm?What are the causes of sandstorms ?What should we do if sandstorms occur?How can we prevent sandstorms?Homework:1. Find more information about sandstorms on the internet or other books and write a short passage about sandstorms. 2. Design a poster that encourages people to protect the environment.