第5练阅读＋七选五＋完形＋书面表达Ⅰ.阅读理解体裁：科普文话题：科学世界词数：360时间：7′SirJohn，aBritishscientistwhowonlastyear'sNobelPrizeformedicine，saidhehadpredictedatthetimeofhisfrogexperimentsthatthesuccessfulcloningofamammalwouldhappenwithin50years，andthat“maybethesameanswerisappropriate”forthesteptohumancloning.Parentswholosechildreninaccidentsmaybeabletoclone“copies”toreplacethemthen.Althoughanyattempttocloneanentirehumanwouldraisecomplexmoralissues，thebiologistclaimedpeoplewouldsoonovercometheirconcernsifthetechniquebecamemedicallyuseful.CloningwasregardedwithextremedoubtswhenitwasfirstdevelopedbutbecamewidelyacceptedafterthebirthofLouiseBrown，thefirst“testtubebaby”．Hesaid，“Whenmyfirstfrogexperimentsweredone，anAmericanreporteraskedhowlongitwillbebeforethesethingscanbedoneinmammalsorhumans.Isaid，‘Well，itcouldbeanywherebetween10yearsand100years—howabout50years？’Itturnedoutthatitwasn'tfaroffthemarkasfarasDollywasconcerned.Maybethesameanswerisappropriate.”SirJohnaddedthatcloningahumanbeingeffectivelymeansmakinganidenticaltwin，anddoctorswouldthereforesimplybe“copyingwhatnaturehasalreadyproduced”．Theaveragevoteonallowingparentsofdeceasedchildren，whoarenolongerfertile(能生育的)，tocreateanotherusingthemother'seggsandskincellsfromthefirstchild，thinkingthetechniquewassafeandeffective，is60percentinfavor.Thereasonsfor“no”areusuallythatthenewchildwouldfeeltheyweresomesortofareplacementforsomething.【语篇解读】本文是一篇科普说明文。主要介绍了克隆人类或在未来50年内变成现实。1．SirJohnpredictedthehumancloningwouldbearealityin________atmost.A．100yearsB．60yearsC．50yearsD．10years答案C[细节理解题。根据第一段中的“thesuccessfulcloningofamammalwouldhappenwithin50years，andthat‘maybethesameanswerisappropriate’forthesteptohumancloning”可知，克隆人类或在未来50年内变成现实。故选C。]2．Accordingtothetext，whichstatementisNOTtrue?A．LouiseBrownisthefirst“testtubebaby”．B．Humancloningisstillacontroversialtopic.C．SirJohnispositiveaboutthefutureofhumancloning.D．Humancloningiscreatingsomethingthatdidn'texistbefore.答案D[细节理解题。根据第二段第二句中的“becamewidelyacceptedafterthebirthofLouiseBrown，th