2019-2020年高考英语阅读、完形填空选练（2）

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1、2019-2020年高考英语阅读、完形填空选练（2）阅读理解【xx·江西省赣中四校高三第二次联考】StudiesshowfarmlandinAfricaisoftenlackinginimportantnutrients.Butresearcherssayabinationoffarmingmethodsmayhelp.Researcherswonderhowtoincreaseproductionwithoutnecessarilyclearingmorelandtogrowadditionalcrops.Americanresearcherssaythatcanhappenwithgrea

2、teruseofanagriculturalsystemcalledperenniation.Itmixesfoodcropswithtreesandperennialplants—thosethatreturnyearafteryear.SoilscientistJohnReganoldsays，“Oneofthemajorproblemsisthatthesoilsarefairlypoorinmostoftheregions.Sohowdoyougrowfoodonpoorsoils？Therehavetobefoodproductionsystemsthatcanbuildthesoi

3、landimprovetheyield.”MrReganoldsayspoorsoilmayhaveresultedfromyearsofweatheringthatwashedawaymanynutrients.Hesayssomefarmersmayhavedonemoreharmthangood.“Theyhavebeenactuallyusingfarmingpracticeswherethey’renotputtinginorganicmatter.They’renotputtinginfertilizers.Theycan’taffordthosethings.Anditjustr

4、unsthesoildown.Sothey’reworseningthesituation.”ThescientistsaysthewordperenniationdefinesthreesystemsthatarealreadyusedinAfrica.Theoldestofthethreeiscalledevergreenagriculture.Thisiswherefarmersplanttreeswiththeircrops.FarmersinAfricahavebeendoingthisforsixtyyears，butitseemstobegrowinginpopularity.T

5、hemethodisgainingwidespreaduseincountriessuchasNiger，BurkinaFaso，MalawiandZambia.Thetreesareplantedamongmaize(玉米)，milletorsorghumcrops.Theynotonlyaddnitrogen(氮)tothesoilthroughtheirroots，butalsothroughtheirleaveswhentheyfalloffandbreakdown.Atothertimesoftheyear，thetreescanprotectplantsfromstrongsunl

6、ight.JohnReganoldsaysheknowsofonewomanwhohashadgreatsuccesswithperenniation.“She’sagrandmotherinherfifties.HernameisRhodaMang’yanaandshestartedusingthissystemabouttwentyyearsago.Andheryieldsinitiallywereaboutatonofmaize.Nowwithagoodyearshegetsfourtonsperhectare，fourtimeswhatshewasgetting.”1．Thepurpo

7、seofthepassageisto________.A．tellpeoplehowtoincreaseproductionB．introduceanagriculturalsysteminAfricaC．introducetheoldestfarmingmethodinAfricaD．tellushowtopreventsoilbeingpoor2．Whatdoestheunderlinedwo