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2025-2026学年上海市徐汇区高三（上）期末英语试卷（一模）

一、选词填空-短文：本大题共1小题，共10分。

1.Directions：Fillineachblankwithaproperwordchosenfromthebox.Eachwordcanbeusedonlyonce.Notethatthereisonewordmorethanyouneed.

A.typicallyB.inevitableC.transmissionD.circulatingE.identified

F.symptomsG.hospitableH.landscapeI.unusuallyJ.emergedK.signals

TheemergenceofthedeadlyUsutuvirusintheUK，whichisdevastatingblackbirdpopulations，servesasastarkwarningthatmosquito-bornediseasesaregainingafootholdinthecountry，atrendsignificantlydrivenbyawarningclimate.Thisdevelopmentnotonlythreatenswildlifebutalso（1）______agrowingpotentialrisktohumanhealth.

OriginatinginSouthAfricain1959，theUsutuvirushasbecomewidespreadacrossEuropeandwasfirst（2）______intheUKin2020.Itsimpacthasbeensevere，withblackbirdnumbersinhotspotslikeLondondroppingbyover40%since2018.Asornithologist（鸟类学家）HughHanmernotes，thisdramaticdeclinewasdirectlycorrelatedwiththevirussarrival.WhileUsutuitselfposesarelativelylowrisktopeople—（3）______causingonlymild，flu-likesymptoms—itsestablishmentintheUKisasignificantmilestone.Itmarksthefirsttimeamosquito-borneviruscapableofjumpingfromanimalstohumanshas（4）______withinthecountryslocalanimalpopulations.Thismakesitacrucialcasestudyforvirologists（病毒学家），providingatemplateforhowother，moredangerousvirusesmightspread.

TheprimaryconcernisWestNilevirus，acloserelativeofUsutu.Bothvirusessharethesame（5）______method，environmentalrequirements，andhosts.ThesamemosquitospeciesthatcarryUsutucantransmitWestNile，andthesamebirdsactasreservoirsforboth.ThisparallelisalarmingbecauseWestNileisfarmoredangeroustohumans.Whileonlyabout20%ofinfectedpeopleshow（6）______，thesecanincludeseverefever，headache，andvomiting，andinrarecases，theinfectioncanbefatal.Thereisno