新概念英語第四冊(cè)課后習(xí)題

1、Structure句型Lesson15insomepartoftheworldpeoplearestill_b_towriteAincapablebimpotentcenabledunable6theycanpreservetheirhistory_d_downlegendsAbyhandbbyhandingctohanddinhand7the_a_whytheselegendsareusefulisthattheytellusaboutmigrationsAcausebeffectcwhydreason8therewerent_a_ofthenwhocouldwritedownwhatthe

2、ydid.AanybnonecnoonednoLesson25itwould_a_impossibleforustoliveinthisworldifinsectshadnoenemies.Amakeitbstaycbedhaveit6weowe_c_tothebirdsandbeastwhoeatinsects.Aagreatdealbalotofcagreatmanydmuchof7howmanyspidersareinvolved_a_thisworkonourbehalf?Aatbforcindto8therearemanydifferent_a_spidersAsortofbkind

3、ofctypeofdkindsLesson3.5earlierclimberslikedsummits_c_hadneverbeenclimbedbefore.Awhichbwhichtheycthattheydunlessthey_d_singleaimwasgettingtothetopAtheyrebtherectheirdtheirs7_a_ZermattandChamonix,mostplaceswereunknown.Aexceptbunlesscwithoutdapartfrom8_b_weregenerallydirtyandflea-ridden.Athefewinnstha

4、texistedbinnslikethisCsuchinnsdfewinnsLesson45severalcaseshavebeenreportedinRussiarecentlyofpeople_b_canreadAwhombthatcwhichdthey6onedayshecameintohisofficeandputherhandsonthedoorofthesafe_c_Aasithappenedbbychancecperhapsdintentionally_d_thesetestswerebeingconducted,shewasabletoreadanewspaper.Adurin

5、gbonoccasioncwhiledasif8Veracouldntseewithherskin_a_shewasblindfold.Aonlybexceptcasifdunless.Lesson55theproblem,ifthereisone,_d_byolderpeopleAcreatedbiscreatedccreatesdiscreating6foronething,ifyou_a_aproblem,youhaveacertainidentity.Awerebbeingchaddare7_c_tobelinkedwithlife,andtheoriginofthings.Athey

6、seembitseemscthisseemsdwhatseems8itis_b_theyareconceitedandill-manneredAnecessarybpermissiblecpossibledlikelyLesson65ifonly_a_possibleforthecommonpeopletomeeteachother.Aitwouldbebitcouldbecitwereditmightbe6youplay_a_winAinordertobinorderthatcsothatdfor7thevillagegreenisthe_a_youpicksides.Atheplacebt

7、hetimecthereasondthecause8_d_thequestionofnationalprestigearisesAthemomentbjustcaslongasdprovedingLesson75not_b_soundmadebyanimalsservesaslanguage.Aeverybeachcthewholedtheentire6wehaveonlytoturntothatextraordinarydiscoveryofecho-locationinbatstoseeacase_a_thevoiceplaysastrictlyutilitarianroleAwhichb

8、wherecwhendthough7_c_heshoutinthevicinityofawall,anechowillcomeback.Ashouldbifcwhendthough8_d_theecho-soundingapparatuswasborn.AsuchbthewaycthatshowdlikethisLesson85americanfarmerscantexportchickenstoeurope_b_differencesinnationalregulations.Athroughbaccordingtocinrespectofdbecauseof6anelectricrazorfromtheeu_a_soldintheusunlessitmeetsusstandards.Aoughtnttobebcantbecshouldntbeddoesnthavetobe7americaandtheeu_a_toreachadealAarestilltryi