第二部分：语言知识及运用（满分25分）

第一节完形填空(共10小题；每小题1.5分，满分15分)

Treesareusefultomaninthreeveryimportantways.Theyprovidehimwithwoodandother __21__;theygivehimshade;theyhelptopreventdrought(干旱)and __22__.

Unfortunatelyinmanypartsoftheworldmanhasnotrealizedthatthethirdoftheseservicesisthemostimportant.

Twothousandyearsagoarichandpowerfulcountrycutdownitstreestobuildwarshipswithwhichtogainitselfanempire.Itgainedtheempirebut__23__itstreesitssoilbecamehardandpoor.Whentheempirefellto__24__thehomecountryfounditselffacedbyfloodsandstarvation.

Evenwhereagovernmentrealizestheimportanceofaplentifulsupplyoftreesitisdifficultfor__25__topersuadethevillagertoseethis.Thevillagerwantswoodtocookhisfoodwith;andhecanearnmoneybymakingcharcoalorsellingwoodtothetownsman.Heisusuallytoolazyortoocarelesstoplantandlookafternewtrees.Sounlessthegovernmenthasagoodsystemofcontrolorcan__26__thepeopletheforestswillslowlydisappear.

Thisdoesnotonlymeanthatthevillagers’sonsandgrandsonshave__27__trees.Theresultsareevenmoreserious;forwheretherearetreestheirrootsbreakthesoilup—allowingtheraintosinkin—andalsobind(结合)thesoilthuspreventingits__28__washedawayeasilybutwheretherearenotreestherainfallsonhardgroundandcarrying__29__withittherichtopsoilinwhichcrops__30__sowell.Withallthetopsoilgonenothingremainsbutworthlessdesert.

21．A.uses B.products C.production D.result

22．A.floods B.soil C.air D.sunlight

23．A.with B.by C.on D.without

24．A.break B.unite C.bits D.pieces

25．A.it B.them C.he D.they

26．A.ask B.educate C.want D.remove

27．A.afew B.fewer