新概念英语第四册课后习题答案Unit 1 CABDD BDAAC AB Unit 2 BCBDC ACAAD BC Unit 3 CABDA CDABA CD Unit 4 ACCAB BCDAA BD Unit 5 CABAB DACBB DD Unit 6 CACCC AAADB AA Unit 7 DCABA BACDA AC Unit 8 BDABD BAABC BC Unit 9 CDBAA CABAC AD Unit 10 CAABD CBBDC AA Unit 11 AABDD DADDB DD Unit 12 CABAC CDACA AB Unit 13 ACDAC BDABC AD Unit 14 DBDCC ACCBD BD Unit 15 CADCD DBACA CA Unit 16 ABCCA DDBAB AC Unit 17 BBADA BBDCD CA Unit 18 BABCD CDCCC BA Unit 19 BBCAD AABDD BC Unit 20 BCADC CCBDB CA Unit 21 BDBBA ADDAB CA Unit 22 CDACB ADBCD AB Unit 23 CADCC DCABC AC Unit 24 AACCB CADDA CD Unit 25 DBADD CACDB CA Unit 26 CBCBA CDDAB AC Unit 27 BCDCC ACCDD DA Unit 28 ADCDA BCADA BD Unit 29 CCADD CCADA BC Unit 30 CABDD BCCAC DC Unit 31 AABAD BADDC BD Unit 32 BDCBA DBDCA BC Unit 33 BDBAD BCCDC BA Unit 34 DCACB DACDB CA Unit 35 CBCAC ABBDC CD Unit 36 ACBCC ACCDB AC Unit 37 CABAC DBCDC BD Unit 38 CAABB ACBDD AB Unit 39 BCADA BDDBD BC Unit 40 DCDAC ADDDA DB Unit 41 ACACD CBBBD BC Unit 42 BCCBD BDADC AC Unit 43 DBABC CDDAC BB Unit 44 AAAAB BBBDC BA Unit 45 CADAC CACDC DC Unit 46 BBDBD ABCDA BD Unit 47 CAADB CACDB BC Unit 48 CCBCC CCDBA AB新概念4 笔记/nce/24278_2.shtmlUnit 1 Finding fossil man一、重点单词解释1、recount：v.叙述注意读音，重音在后。
英语中有“名前动后”之说，重音在前是名词，重音在后是动词。
例如：recordrecount：emotionlessdescribe：a little emotionaldepict：同上narrate：temporal & spacial 时间和空间顺序narrativeportray：像画肖像一样地描述，最强烈2、anthropologist：人类学家注意构词：anthrop = 人philosopher ＝philo ＋sopher ＝爱＋智慧＝哲学家philanthropist ＝phil ＋anthrop ＝爱＋人＝慈善家anthropology 人类学3、ancestor：祖先an －在前面；fore －在前面同义词：forefather，forebear4、flint ：燧石，打火石flinting heart 心太硬，残忍无比、歹毒近义词：cobble鹅卵石Don't act as you were the only pebble on the beach. 不要太自以为是5、rot ：腐烂Leave me rot. =Leave me alone.Rot to death. 自生自灭。
Soon ripe, soon rotten. 早慧早衰。
He is rotton to core. 他坏透顶了。
同义词：decay；decompose：分解；deteriorate：关系恶化（同学们自己查查它的读音）6、trace：痕迹trace the problem. 用作动词，跟踪，找到毛病的根源I follow your trace ＝I follow wherever you go二、课文重点难点分析We can read of things that happened 5,000 years ago in the Near East, where people first learned to write.1、read of 读到相似用法：谈到speak of、talk of、了解到know of 、听说过hear of2、知识点：Near East：Mediterranean,South Europe,North AfricaMiddle East：West AsiaFar East：Chian,Japan,Korea3、where 从句是非限制性从句表原因：我们能够....,因为那里的人们首先学会了书写。
4、补充练习：翻译－口语早于书面语出现翻译一：Oral（spoken）language is earlier than written language.翻译二：Oral（spoken）language is earlier than written counterpart.同学们自己查字典学习－counterpart 这个词two things or two people have the same position The only way that they can preserve their history is to recount it as sagas--legends handed down from one generation of story-tellers to another.5、preserve 保留、保存、腌制（preserved vegetables腌菜）6、本句结构是：The only way... is to recount....（主、系、表结构）如果句子中有only ，那么后面跟的表语结构要用to do sth. 不能用doing sth.7、handed down 定语＝legends where are handed down8、story-teller讲故事的人fortune-teller、palmreader 算命先生These legends are useful because they can tell us something aboutmigrations of people who lived long ago, but none could write downwhat they did.9、migration：移民注意几个相关词汇：migrant bird：侯鸟immigrant：移民（移入）emigrant：移民（移出）同学们仔细体会这几个词的差异，因为我知道很多同学学英语，打算出国留学、办移民，所以这几个词将来会经常用到。
10、none ＝no bodyAnthropologists wondered where the remote ancestors of the Polynesianpeoples(民族) now living in the Pacific Islands came from.11、Polynesian peoples：people＋s 复数表示民族。
But the first people who were like ourselves lived so long agothat even their sagas, if they had any, are forgotten.12、重要句型：if they had any 插入语表示强调-‘即便是有’His relatives, if he had (any), never went to visit him when he was hospitalized.So archaeologists have neither history nor legends to help them to find out where the first ''modern men'' came from.13、neither：读音,英音[ ai ],美音[ i: ] 还有either 这个词14、find 与find out 的区别：find out 指千方百计、费尽周折后找到=explore15、modern men ＝who were like ourselvesFortunately, however, ancient men made tools of stone...16、知识点：表示转折的连接词－however、but、yet规律：but、yet 不要加任何标点，only at the beginning of sentencehowerver : 放在anywhere you want，加逗号therefore 和so 的用法同上，therefore可以放任何地方；so只在句首17、tool小工具instrument实验器械equipment设备18、may have 表推测They may also have used wood and skins ...19、peel果皮leather皮革hide兽皮cowhide牛皮Stone does not decay, and so the tools of long ago have remained when even the bones of the men who made them have disappeared without trace.20、without (any) traceI run after the thief, but he turned the corner and disappeared without trace.Lesson 2: Spare that spiderNew words and expressions 生词短语flocks and herds 牛群和羊群／flCk/ the birds of the same feather flock together.物以类聚，人以群分you are the same flock.也可指人herd多指牛群cowherdcowboythrong and crowd swarmowe /[U/ vt.感激欠I owe you. I owe you a big favor. 欠issueobligeindebt appreciate----常用口语词正式：gratefulthankfulbeast /bi: st/ n 兽形容人野蛮无比，不能用animal 形容creature可以指小孩，女人，不用于男性．fraction / ＇frAkF[n/ n.小部分分数，小数a fraction of rice will sufficeon one＇s behalf 代表．．．利益I beat you on your behalf.我打你是为你好on behalf of somebody /somethinge.g on behalf of chinese government on behalf of ＝representauthority /C:＇WCriti/ n.权威authorize批准authoritative权威性的authoritarian独裁的－tarian带有这种词缀的词都是坏词dictator独裁者dictatorial独裁的authorities １．权威（可单数可复数）２．当局（复数）census /sens[s/ n.统计数据the fifth national population census.censor审查censorious 挑剔的，挑刺的acre /＇eik[/ n.英亩１acre＝４０４７square metersfootball pitch 足球场football yardfootball court football fieldbe content with 满足于满足作表语，不能出现定语结构He is content with status quo.contented heart :心满意足的人spare /spZ[/ v. 不伤害，宽恕spare meHe doesn’t spare himself.I spare no efforts to learn english.( spare no efforts: 不遗余力作什么)Notes on the text 课文注释why, you may wonder－you may wonder why插入语先不管插入语，弄清句子结构you may wonder why spiders should be our friends？插入语位置不固定why以疑问句开头why,you may wonder,the problem of pollution befalls human beings.why,you may wonder,one of my friends is so kindhearted.destroy程度比damage要重得多，片甲不留，消灭光tear into piecesdear enemygreatest enemies:天敌dying enemycrying enemyhuman race:人的种族，一般不加复数，表示一个总称词impossible 和possible 永远不要以人开头It is impossible for somebody to do something.likely可以以人做主语。