Unit 9 when was it invented.ppt
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Unit 9 when was it invented.ppt

Unit9whenwasitinvented.ppt

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Unit9Whenwasitinvented?SectionA(1a-1c)PeriodOneWhataretheFourGreatInventionsinancientChina?(中国古代四大发明)paper-making造纸术WordsandexpressionsLookatthethings.Inwhatorderdoyouthinktheywereinvented?A:Ithinkthecalculatorwasinventedbeforethecomputer.B:well,Ithinkthecalculatorwasinventedafterthecomputer.listenandmatchtheinventionsandthedates.A:Whenwasthe…invented?B:Itwasinventedin_____.calculatortelephoneComputercarTVDiscussion20世纪影响人类十大发明lightbulb1879电灯lightbulb20世纪最糟糕的十项发明plasticbag塑料袋plasticbag把下列句子改为被动语态。1.TheymadethesecomputersinShenzhen.Thesecomputers_________inShenzhen.2.Sheboughtanewbikeyesterday.Anewbike__________byheryesterday.3.Thestudentscleantheroomeveryday.Theroom_________bythestudentseveryday.4.Hewillsinganewsongattheparty.Anewsong___________byhimattheparty.5.Studentscan’ttakethebooksoutofthelibrary.Thebooks____________outofthelibrarybystudents.Thankyou.