Itisestimatedthat，currently,about50，000speciesbecome_____everyyear．
A、extinctThepoorcountriesareextremely_______tointernationaleconomicfluctuations
Tomplacedthebanknotes，_________thechangeandreceipts，backinthedrawer．
Allherhardwork__________intheend，andshefinallypassedtheexam．
Thedestructionofthetwintowers_________shockandangerthroughouttheworld．
Idon’tthinkyou'llchangehismind；oncehe’sdecidedonsosomethinghetendsto_____it.
