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高中英语Unit4Usinglanguage课件新人教版必修2课件.ppt

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Unit4extinction dinosaur inspect incident dust fiercecomeintobeing accordingto AnimalextinctionFastreading3.AccordingtotheUNreport,howmanyanimalsandplantshavedisappearedinthelast500years.Detailedreading:Trueorfalse3.Somescientistsaresure dinosaursdiedoutbecausethe earthgottoohotforthe dinosaurstoliveonanymore. 4.Dinosaursdiedoutsuddenlyabout65millionyearsagoandmanyanimalshavedisappearedinthelast500years.Discussthepossiblereasonsforthedisappearanceofdinosaurs.Thinkaboutwhatismentionedinthetext. 1.Itcameafteranunexpectedincidentwhenahugerockfromspacehittheearthandputtoomuchdustintotheair. 2.Theearthgottoohottoliveon.Discussthepossiblereasonsforthedisappearanceofdinosaurs.Theremaybeotherreasonsforit.ForreferencedodoBeforelisteningtothedodo’s story,trytopredictinpairs howitmighthavebecomeextinct.Listentothetapeandchoosethesentenceonpage30whichgivesthemainideaofthestory:No1iswrong.Itisnotfairtoblamethedodoforhisdisappearance. No3onlyexplainshalfthestory.Thedodoandmandidbecomefriendsbutonlybecausemanwantedtokillthedodosaseasilyaspossible. No4iswrongbecausetheotheranimalsandbirdsdidnotdomuchtosavethedodo.Theywarnedhimbutdidnothelphim. Listentothetapeandchoosethe correctanswertocompleteeach sentenceonpage30.ListeningtexteverywheretogetherandIsharedmyfoodwithhim.However,Ibegantowonderwhyseveralofmydodofriendshaddisappeared.Thenthenumberofourspeciesbegantodecreasequickly.IwassoworriedthatIaskedtheotheranimalsandtheyalltoldme,“YourfriendsarebeingkilledandeatenbyManwhileyouarehuntingforfood.”HadManeatenthem?Icouldn’tbelieveit!WhenIaskedMandirectly,heseemedsurprised.“Ihaven’tseentheotherdodoseither.”hesaid.“Maybesomeoneelsekilledthem.”IbelievedhimbutwhenmoredodosdisappearedIsetatrap.IwentoffasifIwasgoingtohuntbutinsteadIhidintheforestandwaited.SureenoughMancamealong.Heranafterthelastofmydodofriendsandkilledher.IfeltsoangrythatIrushedoutofmyhidingplaceandstraightatMan’sspear.Hekilledmetoo.Afterthattherewerenomoredodosintheworld.Somymottois:becarefulwhoyoutrust. 1atypeofreptile(爬行