高中英语选择性必修2优质课公开课Unit 5 Understanding ideas.pdf

新标准《英语》高中选择性必修第二册

Unit5Adelicateworld

Understandingideas

Activity1

1.Whatanimalscanyouseeinthepicture?

2.Whatkindofchangeswouldtakeplaceif

cats,ratsandrabbitswereintroducedto

anenvironmentlikethis?

2Theywouldhuntthebirdsandeatthenativevegetation,thus

upsettingthelocalecologicalbalance.

Activity2

ØReadthepassageandfindoutwhathappenedtoMacquarieIsland.

Non-nativespeciesintroducedtoMacquarieIslandattacked

nativebirds,andledtoasubstantialreductionofbird

populationandeventheextinctionofparakeets.Inaddition,

non-nativespeciesateanddevastatedthenativevegetation.

Allofthisplayedapartinupsettingthenaturalharmonyof

theisland.Butnowtheisland’secologyisontheroadto

recoverywithhumanefforts.

Activity3Choosetheauthor’spurposeinwritingthepassage

andgiveyourreasons.

1.ToanalysehowMacquarieIslandwassavedfromdestruction.

2.ToinformreadersofthechaoscausedonMacquarieIslandbyHumans.

3.Toentertainreaderswithafunnystoryaboutwhathappenedon

MacquarieIsland.

4.Tosuggestwaysinwhichanecosystemcanbeprotected.

Activity4

ACTION(S):

Activity4Catswerebroughttotheisland.

Rabbitswereintroducedtotheisland.

Aviruswasreleasedontotheisland.

Trapsanddogswereused.

Poisonanddogswereused.

PURPOSE(S):

Toprovidefoodforhumans.

Toremovealltherabbitsfromtheisland.

Tocatchthecats.

Toremoveal