Applicantsshouldnotethatallpositionsare——toAustraliancitizenshiprequirements．

Idon’tthinkyou'llchangehismind；oncehe’sdecidedonsosomethinghetendsto_____it.

TheinteractionsbetweenChinaandtheUSwillsurelyhaveasignificant_______on.peaceandstabilityintheAsia.—Pacificregionandtheworldasawhole.

Thedestructionofthetwintowers_________shockandangerthroughouttheworld．

Itisestimatedthat，currently,about50，000speciesbecome_____everyyear．