Itisestimatedthat，currently,about50，000speciesbecome_____everyyear．
A、extinctAllherhardwork__________intheend，andshefinallypassedtheexam．
Tomplacedthebanknotes，_________thechangeandreceipts，backinthedrawer．
Afterhisuncledied，theyoungman_____thebeautifulestatewithwhichhechangedfromapoormantoawealthynoble．
TheopportunitytoexploreandplayandtheencouragementtodosoCan________theperformanceofmanychildren．
Johnsaysthathispresentjobdoesnotprovidehimwithenough______forhisorganizingability.
