1Ithassavedalotoflandalresdy,butmoreGreatGreenWalls__________(need)为什么答案是areneed2Linda,there'ssomebodyknockingatthedoor.Goandseewho___isA.heB.sheC.itD.that为什么答案是C3Ourgreatcountry____veryfast.

　　1Ithassavedalotoflandalresdy,butmoreGreatGreenWalls__________(need)

　　为什么答案是areneed

　　2Linda,there'ssomebodyknockingatthedoor.Goandseewho___is

　　A.heB.sheC.itD.that为什么答案是C

　　3Ourgreatcountry____veryfast.为什么是ischanging不是haschanged