Unit2课内练习答案（P12Ex.1）
1.Thefirstuseistoproducecommercialquantitiesofplants.Thesecondistoresearchonnewplantsspecialsanddomedicalresearchonanimals.2.Cloningplantsisstraightforward,butthecloningofanimalsisverycomplicated.
3.ThefirstclonefromanadultanimalwasDollythesheep.Shediedin2003.
4.Cloningiscontroversialinsomecountriesformoralandreligiousreasons.P12Ex.2
Problemsordangersofcloning
Evilleadersmaywanttoclonethemselves.
Animalclonesmaydeveloptheillnessesofolderanimals.Animalclonesmaydieyoungerthanthedonoranimals.Therearemoralobjectionstocloninghumanbeing.Advantagesofcloning
Medicalcloningcouldproducecuresforseriousillnessinhumans.Cloningplantscanbeusefulforresearchonnewplantspecies.Cloningplantscanproduceplantsofsimilarqualityforsale.Cloningcanhelpsaveendangeredanimals.P12EX.3
Ithinkthewriterisimpartialbecausehe/shedoesnotstateanypersonalopinionaboutcloning.P13Ex.1
1differ2cast3accumulate4exact5altogether6objections7undertake8moral.P13Ex.2
1straightforward2arbitrary3commercial4madeanobjectionto5obtain6willforbidP13Ex.3
1attain2complicated3fate4carrier5cast6reform7accumulateP14Ex2
1997年多莉羊诞生的消息宣布后便成为一项科学突破。但是，后来多莉染上严重肺病的问题又使科学家们忧虑。2003年2月14日科学家们做出让多莉长眠的决定。多莉之死正如它的出世一样，肯定会带来焦虑。多莉早亡的事实令世人失望。科学家们认为克隆可能会带来很多重大的科学突破和医学疗法，但是现在他们不得不思考这样的
问题：“多莉早死是因为它是一只克隆羊吗？”除此之外，关于是否应该允许进行人类克隆实验的问题也引起了激烈的争论。科学家们相信人类的克隆只不过是时间的问题，但是克隆人已经问世的说法还没有被证实。P14Ex.3
1.thatshewouldcomenextweekforashortvisit
2.thatawomantrappedundertheruinsforsixdayswasrescued3.thathefailedinthetest
4.thatshehaddreamedofforyears5.thathemusthavesafetytraining6.thattheinterviewwentwell
7.thatthepeopleintheearthquake-hitareashadrebuilttheirhomes8.thateveryoneinclassdidwellintheperformanceP16Ex.1
1.Therewillnotbeenoughgeneticvariationinthegrouptobeabletoresistnewillnesses.
2.Itisnotagoodideatocloneananimalthatwouldliveinazoobecauseitisnotasuitablehabitattodevelopandincreaseitsnumbers.Thezooisnotanaturalenvironmentforawildanimal.P17Ex.11、3、4、5P17Ex.2
Workbook练习答案（P54Ex.2）2、3、4P54Ex.3
1.Clarethinkspeoplewillwanttobuyclonedbabiesiftheycannothavebabiesoftheirown.
2.Peoplehavenotthoughtthattheremaybedishonestlaboratorieswhowillproduceandsellclonedbabieslikeababyfactory.3.（略）4.(略)
P55Ex1
procedure,assumption,beboundto,resist,fromtimetotime,restoring,shortly,claws,broughtbackP55Ex.2
1intime2indanger3invain4inblackpen5infavorof6InthemeantimeP55Ex.3
1.Iadorehomemaderectangularloavesmadewithbrownflourandnuts.2.Heisveryconservative,andiseveninfavorofaconstitutionthatgivesfewrightstoimmigrantvoters.
3.Whentheleaderofthechorusretiredfromtheopera,theyheldadinnerpartyforhim.
4.Themediaplaysanimportantroleininfluencingpublicopinion.5.Don’tbotherabouttakingdownthosedecorationsyet.TheChristmascelebrationsaren’toveryet.
6.Theregulationsforcloninganimalsareverystrict,andheisunabletocontinuehisexperiments.
7.Don’tbotheryourselfaboutcloningmypetcat.Iwon’texpecttobringitbacktolife.
8.ThepeopleinfloodedareasowedagreatdealtothePLAsoldiersfortheirrescuework.P56Ex.1
1C2E3A/F4B5A/F6DP56Ex.2
1.thattheyshouldbuyanewcar
2.thattheywantedthemostexpensiveone3.thattheywouldsaveforsixmonths4.thatSue’sunclehaddiedunexpectedly
5.thatshemustfollowwhensheinheritedmoney6.thatsheshouldsaveallhermoneyinthebank7.thatshewasdoingtherightthingtousethemoneyAppositiveclauses:1、3、4P56Ex.3
1.theexplorer,2.howhegothisjob.3.thatmountainclimbingwassopopularinhishometowninFlorida,4.thathebothcouldtakerisksandearnaliving5.thathewouldstudyearthsciencesatuniversity6.Thathespokemanylanguages7.whyhedidnotmakeithiscareer8.thatheisretiringthisyear
.P57Ex.2
1O2O3F4O5F6O7F8O9O10FP57Ex.3
1.Hewantstomakehismotherhappybykeepingherpetdogalive
forever,andalsowantstotakethechancetoAmericaforholidaywhenthedogisbeingclonedthere.
2.Frankdoesn’tagreewithcloningbecausehethinkscloningisveryexpensiveandithasmanymoralproblems.
3.Billy’smotherisinfavorofcloning.SheissavingmoneytogotoAmericatohaveherpetdogclonedjustbeforeitdies.4.(略)P57Ex.4
P57Ex.5
BILLY:1.thecloningprocedure;2.theexperimentsinAmerica
FRANK:1.yourmothertoloveherdog,soshewillwanttocloneitwhenitgetsold.2.takeadvantageofthattohaveagoodholidayP59Ex.
