Scientists(科学家)aretryingtomakethedeserts(沙漠)intogoodlandagain.Theywanttobringwatertothedeserts,sopeoplecanliveandgrowfood.Theyarelearningalotaboutthedeserts.Butmoreandmoreoftheearthisbecomingdesertsallthetime.Scientistsmaynotbeabletochangethedeserts.Scientiststhinkthatpeoplemakedeserts.Peoplearedoingbadthingstotheearth. Someplacesontheearthdon’tgetmuchrain.Buttheystilldon’tbecomedeserts.Thisisbecausesomegreenplantsaregrowingthere.Smallgreenplantsandgrassareveryhelpfultodry(干旱的)places.Plantsdon’tletthehotsunmaketheearthevendrier.Plantsdon’tletthewindblowtheearthaway.Whenalittlebitofrainfalls,theplantsholdthewater.Withoutplants,thelandcanbecomedesertsmuchmoreeasily. 小题1:Whycanthelandbecomedeserts? |
A.Someplacesdon’tgetmuchrain. |
B.Plantsdon’tletthehotsunmaketheearthevendrier. |
C.Peopledon’tkeeptheearthwell. |
D.Scientistshaven’tlearntenoughaboutthedeserts. |
小题2:Scientistsare tomakethedesertsintogoodlandagain.
A.carryingwater | B.growingfood | C.doingnothing | D.studyingalot |
小题3:WhichisNOTtrue?
A.Thelandneverstopsbecomingdeserts. |
B.Scientistsaskpeopletoliveinthedesertsandgrowfoodthere. |
C.Peopledobadthingstotheearth. |
D.Scientistsmaynotbeabletochangethedeserts. |
小题4:Whyaregreenplantsandgrasshelpful?
A.Theycanholdthewater. |
B.Theycankeeptheearthwet. |
C.Theycanstopthewindfromblowingtheearthaway. |
D.Alltheabove. |
小题5:Whichisthebesttitle(题目)forthepassage?
A.TheDesertProblem |
B.PeopleMakeDeserts |
C.GreenPlantsandGrass |
D.TheDeserts,theTreeandtheWater |