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firehurricaneearthquakevolcanic eruptionlightninglandslide Natural disastersWhat disaster is it?Sandstorms (Activity 1 on page 31)Whats the causes of sandstorms?(Activity 2 on p31)skimming(find the main idea with each paragraph）Para.1 suggestionsPara.2 causesPara.3 descriptionsPara.4 measuresPara.5 introductionPara.6 effectsTip:The first or last sentence can be helpful.Read the passage again and answer the questions.Tip:the key words.Paragraphs 24:strongdrycarry sandParagraph 2:Paragraph 2:ABCDCentral AsiaNorth AmericaCentral AfricaAustralia Paragraph 2:不定式做什么句子成分？是什么从句？Paragraph 3As a result of desertification.appear to do When _ happen,citizens wake up to an orange _ and strong _ that cover the city in a thick,brown-yellow _.dustskywindssandstorms?-traffic moves very slowly.Paragraph 4Sandstorms are strong,dry winds _carry sand.They appear to _(increase)in recent years as a _ of desertification.When they happen,the traffic moves very _(slow)because the thick dust makes _ difficult to see.When a sandstorm arrives in the city,weather experts _ people not to go out.So_ you want to go out,youd better wear a _.Scientists have tried many ways _ solve the problem._(prevent)it coming nearer,the government is planting trees.advisetoresultmaskslowlyithave increasedifthatwhichTo prevent Post-readingComplete the blanks（走进高考）1.for centuries 多个世纪以来多个世纪以来2.a mass campaign 大规模运动大规模运动3.solve the problem解决问题解决问题4.get caught in 被困住被困住5.appear to 似乎，好像似乎，好像6.as a result of 由于由于7.cut down砍倒；削减砍倒；削减8.dig up 挖掘挖掘9.wake up to 警觉到；意识到警觉到；意识到10.make it adj/noun to do/clause12.make sb ill 让某人不舒服让某人不舒服13.prevent sb from doing sth阻止某人做某事阻止某人做某事Important phrasesHow to prevent sandstorms?Brainstorm:Homework
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