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,itcouldbeanywh