Itisestimatedthat，currently,about50，000speciesbecome_____everyyear．
A、extinctTheopportunitytoexploreandplayandtheencouragementtodosoCan________theperformanceofmanychildren．
In1991，whilet11eeconomiesofindustrializedcountriesmetaneconomic_____，theeconomiesofdevelopingcountriesweregrowingveryfast．
Idon’tthinkyou'llchangehismind；oncehe’sdecidedonsosomethinghetendsto_____it.
Hiswifehasbeen_______alotofpressureonhimtochangehisjob.
Applicantsshouldnotethatallpositionsare——toAustraliancitizenshiprequirements．
