3、nyplantsoranimalsinthem B.canallbeturnedintogoodlandbeforelong C.arebecomingsmallerandsmaller D.getverylittlerain42.Small green plants are very important to dry placesbecause______. A.theydon’tletthesunmaketheearthevendrier B.theydon’tletthewin
4、dblowthesoilaway C.theyholdwater D.Alloftheabove.43.Land is becoming desert little by little because______. A.plantscan’tgrowthere B.thereisnotenoughrain C.peoplehaven’tdonewhatscientistswishthemtodo D.scientistsknowlittleaboutthedeserts44.