Unit 4 Lesson 21 课件-冀教版英语八年级下册

Lesson21BooksorComputers?Unit4Readingbooksisuseful.Readingbooksisimportant.Readingbooksismeaningful.Weshouldkeeponreading!paperbooks(realbooks)Pre-readingInancienttimes，therewerenobooks,peoplepassedontheirknowledgebytellingstories.Later,paperbooksappeared.Peoplebegantowritestoriesbyhand.Butittookalongtimetowriteonebook.Pre-readingItcanmakethousandsofbooksaday.Thisisamordenprintingpress.Recently,

electronicbook(e-book)appeared.Peoplecanbuyandsellbooksonlineeasily.Pre-readingFast-readingReadthepassagequicklyandanswerthefollowingquestion.*Whatisthemainideaofthepassage?Thehistoryofbooksisveryinteresting.ReadingTips:Payattentiontothefirstparagraphandthelastparagraph.Task1:Readparagraph1and

finishthemindmap.InancienttimesTherewere________.

nobookspassedonknowledgeby_______________

tellingstoriesWithpaperwrotedown__________stories.wroteeachword_________byhandInformationcouldn’ttravelfar.Careful

readingTask2:Readparagraph2andanswerthequestions.2.Withmorderntechnology,itwaspossibletoprintbooksquickly.(translate)_________________________________________.用现代技术，快速打印书成为一种可能。1.

Whatmadeitpossibletoprintbooksquickly?Theprintingpress.Careful

reading2.Informationtravelsfasterandfarther.Task3:Readparagraph3andanswerthequestion.

*Whataretheadvantagesofe-books?1.Itiseasierforpeopletobuyandsellbooksonline.Careful

readinge-bookspaperbooksadvantagesdisadvantagesCareful

reading1.savealotofmoney2.savealotoftime3.conventienttotake4.readanywhereandanytime...1.bebadforeyes(health)...2.rmationcanbekeptinourmindforalongtime...1.notconventienttotake(tooheavy)2.wastepaper(wastewood/trees)...Task4:Fromparagraph4,wecanlearnthat…Keeponreading!Careful

readingNowadays,peoplehave__________waysto_____________.Nomatterwhatyouhave,a___________,a_________,an____________ora__________.Pleaseremember:_____________________________manyreadbookscomputertablete-readerrealbookthehistoryofbooksinancienttimes,nobooks,tellstorieslater,withpaper,writedownstoriesbyhandthen,theprintingpress,printbooksrecently,e-books,easiertobuyandsellpostreadingNowadays,nomatterwhatyou

have,keeponreading!Choosegoodbookstoread!

Thankyoutosharethehistoryofbookswithme!