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.A

2、mericanresearcherssaythatcanhappenwithgreateruseofanagriculturalsystemcalledperenniation.Itmixesfoodcropswithtreesandperennialplants—thosethatreturnyearafteryear.SoilscientistJohnReganoldsays，“Oneofthemajorproblemsisthatthesoilsarefairlypoorinmostoftheregion

3、s.Sohowdoyougrowfoodonpoorsoils？Therehavetobefoodproductionsystemsthatcanbuildthesoilandimprovetheyield.”MrReganoldsayspoorsoilmayhaveresultedfromyearsofweatheringthatwashedawaymanynutrients.Hesayssomefarmersmayhavedonemoreharmthangood.“Theyhavebeenactuallyu

4、singfarmingpracticeswherethey’renotputtinginorganicmatter.They’renotputtinginfertilizers.Theycan’taffordthosethings.Anditjustrunsthesoildown.Sothey’reworseningthesituation.”ThescientistsaysthewordperenniationdefinesthreesystemsthatarealreadyusedinAfrica.Theo

5、ldestofthethreeiscalledevergreenagriculture.Thisiswherefarmersplanttreeswiththeircrops.FarmersinAfricahavebeendoingthisforsixtyyears，butitseemstobegrowinginpopularity.ThemethodisgainingwidespreaduseincountriessuchasNiger，BurkinaFaso，MalawiandZambia.Thetreesa

6、replantedamongmaize(玉米)，milletorsorghumcrops.Theynotonlyaddnitrogen(氮)tothesoilthroughtheirroots，butalsothroughtheirleaveswhentheyfalloffandbreakdown.Atothertimesoftheyear，thetreescanprotectplantsfromstrongsunlight.JohnReganoldsaysheknowsofonewomanwhohashadg

7、reatsuccesswithperenniation.“She’sagrandmotherinherfifties.HernameisRhodaMang’yanaandshestartedusingthissystemabouttwentyyearsago.Andheryieldsinitiallywereaboutatonofmaize.Nowwithagoodyearshegetsfourtonsperhectare，fourtimeswhatshewasgetting.”1．Thepurposeofth

8、epassageisto________.A．tellpeoplehowtoincreaseproductionB．introduceanagriculturalsysteminAfricaC．introducetheoldestfarmingmethodinAfricaD．tellushowtopreventsoilbeingpoor2．Whatdoestheunderlinedwo