1、Section Introduction & Reading and Vocabulary课前自学导引Frankensteins MonsterPart 1 The story of FrankensteinFrankenstein is the name of a young scientist from Geneva, in Switzerland. While studying at university, he discovers the secret of how to create life. Using bones from dead bodies, he creates a c
2、reature that resembles a human being and gives it life. The creature, which is very large and strong, and is also extremely ugly, terrifies anyone who sees it. However, the monster, who has learnt to speak, is intelligent and has human emotions. He becomes lonely and unhappy when he cannot find any
3、friends and soon he begins to hate his creator Frankenstein. When Frankenstein refuses to create a wife for him, the monster murders Frankensteins brother, his best friend Clerval, and finally, Frankensteins new wife Elizabeth. The scientist chases the creature to the Arctic in order to destroy him,
4、 but he dies there. At the end of the story, the monster disappears into the ice and snow to end his own life.词汇自测terrify v. 使惊恐，使受惊吓emotion n. 感情；情绪refuse v. 拒绝murder v. 谋杀chase v. 追逐，追赶，追踪弗兰肯斯坦的怪物第一部分弗兰肯斯坦的故事弗兰肯斯坦是瑞士日内瓦一位年轻科学家的名字。还在上大学时，他就发现了怎样创造生命的秘密。利用死人的骨头，他制造出一个像人的怪物，并赋予了它生命。那个怪物异乎寻常地高大、强壮，并且极
5、其丑陋，所有的人见了它都感到害怕。但是，怪物却有着人类的智力和情感，并学会了说话。由于找不到任何朋友，他感到非常孤独和难过，并开始憎恨创造他的那个人弗兰肯斯坦。当弗兰肯斯坦拒绝为他造一个妻子后，怪物杀害了弗兰肯斯坦的兄弟和他最好的朋友克莱瓦尔，最后，还杀死了弗兰肯斯坦的新婚妻子伊丽莎白。为了除掉怪物，弗兰肯斯坦追赶他到北极，但弗兰肯斯坦本人却死在了那儿。在故事的结尾部分，怪物在冰天雪地中结束了自己的生命。Part 2 Extract from FrankensteinIt was on a cold November night that I saw my creation for the f
6、irst time. Feeling very anxious, I prepared the equipment that would give life to the thing that lay at my feet. It was already one in the morning and the rain fell against the window. My candle was almost burnt out when, by its tiny light, I saw the yellow eye of the creature open. It breathed hard
7、, and moved its arms and legs.How can I describe my emotions when I saw this happen? How can I describe the monster who I had worked so hard to create? I had tried to make him beautiful. Beautiful! He was the ugliest thing I had ever seen! You could see the veins beneath his yellow skin. His hair wa
8、s black and his teeth were white. But these things contrasted horribly with his yellow eyes, his wrinkled yellow skin and black lips.词汇自测burn_out (火)燃尽，烧完自灭breathe v. 呼吸vein n. 血管；静脉contrast v. 对照contrast_with 与形成对照wrinkled adj. (皮肤等)布满皱纹的，具有皱褶的第二部分弗兰肯斯坦节选我是在11月一个寒冷的晚上首次看到我的创造物的。它躺在我的脚边，我紧张不安地准备好了赋予
9、它生命所需的设备。时间已是凌晨1点，雨点敲打着窗户。蜡烛即将燃尽，就在此时，借着微弱的烛光，我看见怪物睁开了黄色的眼睛。它喘着粗气，挪动着四肢。该怎样描述我看见这一切发生时内心的感受呢？ 该怎样描述我费尽心血创造出来的这个怪物的模样呢？ 我曾尽力想把他创造得好看一些。好看？ 他是我看到过的最丑陋的东西！ 他黄色皮肤下的血管依稀可见。他头发是黑色的，牙齿是白色的。但却与他的黄眼睛、皱巴巴的黄色皮肤以及黑嘴唇形成了骇人的对比。I had worked for nearly two years with one aim only, to give life to a lifeless body. F
10、or this I had not slept, I had destroyed my health. I had wanted it more than anything in the world. But now I had finished, the beauty of the dream vanished, and horror and disgust filled my heart. Now my only thoughts were, “I wish I had not created this creature, I wish I was on the other side of
11、 the world, I wish I could disappear！” When he turned to look at me, I felt unable to stay in the same room as him. I rushed out, and for a long time I walked up and down my bedroom. At last I threw myself on the bed in my clothes, trying to find a few moments of sleep. But although I slept, I had t
12、errible dreams. I dreamt I saw my fiance walking in the streets of our town. She looked well and happy but as I kissed her lips, they became pale, as if she were dead. Her face changed and I thought I held the body of my dead mother in my arms. I woke, shaking with fear. At that same moment, I saw t
13、he creature that I had created. He was standing by my bed and watching me. His mouth opened and he made a sound, then seemed to smile. I think he wanted to speak, but I did not hear. He put out a hand, as if he wanted to keep me there, but I ran out of the room. I hid in the garden and stayed there
14、till morning, terrified by what I had done. Again and again I thought, “I wish I had not done this terrible thing, I wish I was dead！”You cannot imagine the horror of that face! I had seen him when he was unfinishedhe was ugly then. But when he stood up and moved, he became a creature from my worst
15、nightmares.词汇自测rush v. 冲，猛冲throw oneself on . 扑倒在上fiance n. 未婚妻fear n. 害怕，恐惧make_a_sound 发出声音again_and_again 一再，屡次nightmare n. 噩梦我忙了近两年，目标只有一个， 赋予一个无生命的东西以生命。为此，我放弃了睡眠，累坏了身体。它一度是这个世界上我最想要的东西。现在我已经完成了创作，但梦想中的美丽已荡然无存，恐怖和厌恶充斥着我的心灵。现在，我唯一的想法是：“但愿我没有制造出那个家伙，但愿我身处世界的另一边，但愿我可以消失无踪！”当他转过身来看着我时，我受不了和他呆在同一个房间
16、里。我冲了出去，接下来的很长时间就在自己的卧室来回踱步。最后我和衣倒在床上，试图睡一会儿。尽管我睡着了，但是噩梦连连。我梦见我的未婚妻走在城镇的大街上。她看上去健康而快乐，但是，当我亲吻她时，她双唇失色，犹如死人。她的脸变了，我感觉拥抱着的是我死去的母亲。我浑身战栗着吓醒了。就在那一刻，我看见了我创造出的怪物。他正站在我床边，看着我。他张开嘴，发出一个声音，然后像是笑了。我猜他想说什么，但我没听见。他伸出手来，好像是想拦住我，但我冲出了房间。由于害怕，我藏身花园，一直呆到天亮。我一遍又一遍地想：“但愿我没有做这可怕的一切，但愿我死了！”你无法想像那张脸有多可怕！ 当他还没有生命的时候，我看着他
17、，只觉得他丑陋。当他站起来行走后，他就成了我最可怕的噩梦中的怪物。课堂合作探究破解重点词汇The thunderstorm terrified the child.雷雨把那个小孩吓坏了。归纳拓展terrify sb. into doing sth. 威胁某人做某事terrifying adj. 令人害怕的，令人恐惧的terrified adj. 感到害怕的，感到恐惧的be terrified of sb./sth. 害怕某人或某物be terrified of doing sth. 害怕做某事be terrified that . 害怕be terrified at 因而害怕She was t
18、errified at the thought of being alone.一想到孤零零的一个人，她就惊恐不安。一句背诵：From the boys terrified look, we can see the terrifying noise terrified him.从男孩害怕的表情我们可以看出那个可怕的噪音使他受到了惊吓。【即景活用】单句语法填空(1)The child was _ (terrify) of speaking in front of other people.(2)While watching the boy fall off the tall tree, I sto
19、od there, _ (terrify) out of my mind.答案：(1)terrified(2)terrifiedHe walked a long time and he must have burned himself out.他走了很长时间，他一定已经累坏了。The small fire can safely be left to burn out.剩下一点小火可以放心地让它自行烧灭。归纳拓展burn up 被烧光，被烧毁burn down 烧毁，烧光，烧尽burn away 烧毁burn to the ground 被烧成平地The house had burnt up b
20、efore the firemen got there.屋子在消防员赶到之前就烧光了。Moscow fires burnt down nearly 11.7 million hectares forest.莫斯科大火将近1,170万公顷的森林夷为平地。名师点津burn out既可作及物动词词组，也可作不及物动词词组。【即景活用】A.单句语法填空(1)The hotel was completely _ (burn) out, and only the walls remained.B.单句写作(2)如果你忘了关火，你可能会烧毁这个房子。If you forgot to turn it off,
21、 you might _ the house.答案：(1)burned(2)burn downIt is good for the health to breathe deeply.深呼吸有利于身体健康。归纳拓展(1)breathe in 吸气breathe out 呼气(2)breath n. 呼吸hold ones breath 屏住呼吸lose ones breath 上气不接下气out of breath 气喘吁吁，上气不接下气take a deep breath 深吸一口气take ones breath away 使某人吃惊breathless adj. 气喘吁吁的After th
22、ey climbed to the top of the hill, they were out of breath.他们爬上山顶后，都累得上气不接下气。Take a deep breath, and then you may feel relaxed.深深地吸一口气，那样你会觉得轻松。【即景活用】单句写作(1)我们吸入的空气越来越脏。The air we _ in is getting dirtier and dirtier.(2)观众屏住呼吸看谁会赢。The audience _ to see who would win the gold medal.答案：(1)breathe(2)hel
23、d their breathThe writer contrasts good with evil.作家使美好与邪恶形成对照。归纳拓展contrast . with . 使与形成对比contrast with 形成对照by/in contrast 对比之下in contrast to/with 与形成对比Her actions contrasted sharply with her promises.她的行动与她的诺言相差甚远。The white yacht contrasted with the blue sea.那艘白色的游艇与蔚蓝的大海形成对照。His white hair was in
24、 sharp contrast to his dark skin.他的白头发与黑皮肤形成了鲜明的对比。compare“比较”，指对相似之处或不同之处作比较；“把比拟成”，用于比喻。contrast“对比，对照”，常用于比较不同之处以凸现其差异。【即景活用】单句写作(1)汤姆考试差点不及格，而相比之下他的妹妹考得很好。Tom almost failed the exam, but his sister, _， did very well. (2)相对于传统媒体，互联网广告有许多优势。_ traditional media, Internet advertising has a lot of ad
25、vantages.答案：(1)by/in contrast(2)In contrast with/toHe tried to catch the butterfly, but threw himself on the ground.他想抓住那只蝴蝶，但扑倒在地上。You can never throw yourself on that fellow.你决不能依赖那家伙。归纳拓展throw on匆匆穿上throw away 扔掉；抛弃；错过；浪费throw out 扔掉；脱口而出；发(光)，冒(烟)throw up 呕吐；使显眼throw off 匆忙地脱掉衣服，摆脱掉throw oneself
26、 into 投身于，热衷于throw light on (问题等)较容易理解；阐明He threw himself into the political activities.他积极投身到政治活动中。【即景活用】单句写作(1)把好的食物扔掉是浪费。It is a waste _ good food.(2)他坐到椅子上，开始思考。He _ a chair, and began to think.(3)他的研究有些有意思的发现。His research has _ some interesting facts.答案：(1)to throw away(2)threw himself into(3)t
27、hrown light onWe lived in constant fear of losing our jobs.我们一直生活在担心失业的阴影里。There was nothing to fear.没什么可怕的。归纳拓展 害怕做某事for fear of/that . 因为怕；唯恐，以免with fear 害怕地in fear 惊恐地He appeared calm, but inside his heart was beating wildly with fear.他外表显得很平静，但因为害怕而心跳得很剧烈。【即景活用】A.单句语法填空(1)We spoke in a low voice
28、 for fear _ we might wake the baby.B.单句写作(2)关上窗子以防下雨。Shut the window _ rain.答案：(1)that(2)for fear ofIt took them six hours to put the fire out.他们用了六小时才把这场火扑灭了。归纳拓展put away 把收起来，放好put up with 容忍put down 贬低，镇压put forward 提出；拿出put off 推迟，拖延put on 穿上，戴上；上演put through 完成How can you put up with so many ad
29、s in between programmes？你怎么能忍受节目中间插播那么多的广告？一句背诵：I cant put up with his putting off doing exercise again and put forward my requirement that he should put away his toys and put on his clothes to take exercise.我不能容忍他再一次推迟锻炼并提出了我的要求：他应该放下玩具，穿上衣服去锻炼。【即景活用】A.单句语法填空(1)Would you please remind him that our
30、meeting has been put_？B.单句写作(2)这些玩具被发现收进了地下室。Those toys can be found _ in the basement.答案：(1)off(2)put away掌握难句解析1.The novel immediately became very popular and it is generally agreed that it is one of the best science fiction stories ever written.(P57)这部小说立即受到欢迎，并被一致认为是写得最好的科幻小说之一。这是一个并列复合句，其中it is
31、 agreed that . 是一个固定句式，意为“大家一致认为”，it 作形式主语，that引导的从句是主语从句，类似的结构还有：It is said/reported/believed/hoped/required/suggested/thought that . 据说/据报道/人们相信/人们希望/人们要求/人们建议/人们认为。It has been suggested that bright children should take their exams early.有人建议天资聪颖的孩子提前考试。It is said that the couple have left the cou
32、ntry.据说那对夫妇已经离开了这个国家。【即景活用】单句写作据报道在未来几年里(人们)将在月球建立空间站。_a space station will be built on the moon in years to come.答案：It is reported that2.While studying at university, he discovers the secret of how to create life.(P58)上大学时，他发现了怎样创造生命的秘密。本句在while引导的时间状语从句中省略了从句主语he和be动词was。在when, while, once, if, un
33、less, even if, although等引导的状语从句中，当从句的主语与主句的主语一致或从句主语是it，且从句中有be动词时，可省略从句中的主语和be动词。When (she was) asked where she was from, the little girl was only crying, saying nothing.当被问到是哪里人时，小女孩只是哭，什么都不说。Unless (I am) invited, I wont attend the meeting.除非受到邀请，否则我不会参加这个会议。【即景活用】A.单句语法填空(1)While _ (wait) for th
34、e opportunity to get promoyed, Henry did his best to perform his duty.B.单句改错(2)If accepting for the job, youll be informed soon._答案：(1)waiting(2)acceptingaccepted课堂总结演练单句语法填空1.She was _ (terrify) at the frightening scene.答案：terrified2The old mans face was _ (wrinkle) with age.答案：wrinkled3_ (fear) to
35、 face her cruel stepmother, the girl wandered on the street.答案：Fearing4He read the letter _ the light of the candle.答案：by单句改错1If permitting, I will go there at once by plane._答案：permittingpermitted2The nurse walked on tiptoe for fear that waking the patient._答案：thatof3I burst into tears and threw my
36、self on my mothers arms._答案：oninto4I ran to the theatre all along and was out of my breath._答案：去掉my5He refused to adopting the plan on the grounds of its high cost._答案：adoptingadopt演练通关提升 夯实基础知识单词拼写1He was put into prison because he _ (谋杀) an old lady.答案：murdered2His _ (布满皱纹的) face tells us he has s
37、uffered a lot in his life.答案：wrinkled3In _ (相比之下), the domestic market remains strong.答案：contrast4_ (害怕) of losing a job is a big reason why people are considering saving money.答案：Fear5I felt _ (反感的) when I saw the woman was showing off her wealth.答案：disgusted6He was t_ of heights.答案：terrified7A cat
38、 is c_ a mouse in the street.答案：chasing8I asked him to show me the record that was kept of the meeting, but he r_.答案：refused9Hearing the sharp cry upstairs, they r_ to the upstairs.答案：rushed10When we b_， we draw air into our lungs.答案：breathe单句语法填空1In our country the cold weather in the north contras
39、ts sharply _ the hot weather in the south.答案：with2Jenny said she was _ (disgust) by the programme on TV, so she turned it off.答案：disgusted3People are recycling many things which they _ (throw) away in the past.答案：would have thrown4She refused _ (accept) the fact that there was a financial problem.答案
40、：to accept5The 800meter run left me out of _ (breathe)答案：breath6He got up early at 6：00 in the morning for fear _ being late for the interview.答案：of7The picture _ (hang) on the wall is painted by my nephew.答案：hanging8The school rules state that no child shall be allowed out of the school during the
41、day, _ accompanied by an adult.答案：unless9Your car is _ (identically) to mine.答案：identical10If youre feeling _ (burn) out and overwhelmed, its time to slow down.答案：burned提升实战能力完形填空Have you ever imagined that you could be cloned (克隆) like Dolly the sheep, in the not too distant future?The news that a
42、human embryo (胚胎) has been _1_ cloned for the first time has caused mixed reactions (反应)The _2_ was carried out by scientists from the Advanced Cell Technology Inc (ACT), in Massachusetts, the US. The group _3_ the news known on November 25.This is not a cloned human being. A clone is _4_， it walks,
43、 it breathes, said Jamie Griffon, a(n) _5_ on the study of cloning at New York University School of Medicine.“This is a set of cells in a lab that will be used to _6_ someones life.”Such research could lead to treatment for _7_ such as heart disease, AIDS and even cancer, _8_ scientists.Despite high
44、 hopes from other scientists, the news raised concerns immediately from religious and political leaders. Several _9_ in the US do not allow human cloning. Former President George WBush also made it clear that he is _10_ any type of human cloning. However, the scientists at ACT said they had no inter
45、est at present in _11_ an early embryo into _12_.Animals have been cloned repeatedly since Dolly, the sheep _13_ in 1997. And there were no real technical_14_ to stand in the way of scientists making a cloned human embryo.This time the research group used traditional cloning technology with a human
46、_15_. _16_ it was given DNA from an adult cell, the egg began to _17_. But it was _18_ from becoming a babyat a stage in which it was _19_ a ball of cells. The _20_ technology has been used to clone sheep, cattle and monkeys.篇章导读：本文是一篇说明文。文章讲述了克隆人类细胞的问题以及不同的人的不同反应。1A.slowly BneverCsuccessfully Dsimi
47、larly答案：C由上文可知人类胚胎已经被成功克隆出来了。successfully “成功地”。2A.research Breport Cworks Dtask答案：A对人类胚胎进行的肯定是研究，故选A。3A.made Btook Csaid Dhad答案：A根据上下文可知，这里是说在11月25号宣布了这一消息。make . known “宣布，使为人所知”。故选A。4A.exciting Blovely Cordinary Dalive答案：D由上下文可知，克隆人并没有被研究出来，只是克隆出了胚胎，由下文的会走路、会呼吸可知克隆人应该是活着的(alive)。故选D。5A.worker Bhe
48、adCexpert Dassistant答案：C联系上下文，由上文的ACT可知，研究这一项目的应是科学家或专家(expert)。故选C。6A.save Brescue Ccure Dtreat答案：A由下文可知，克隆胚胎可以救人。故选A。7A.patients Bhealth Cdiseases Dthings答案：C根据后面的“such as heart disease .”可知此处应为疾病(disease)。故选C。8A.according to Bas toCdue to Dnext to答案：A由句意可知，为“根据医生的说法”according to “根据”，故选A。9A.count
49、ries Bnations Cpeoples Dstates答案：D由文意可知是美国的几个州禁止克隆人。故选D。10A.for Bagainst Cover Dwith答案：B根据本段第一句(主旨句)可知，第9、10空所在的句子在举例说明人们反对克隆的态度，推知Bush总统是反对克隆人的。故选B。11A.developing BbuildingCinventing Ddiscovering答案：A由文意可知，科学家们还不想把胚胎培育成婴儿，develop “发展；培育”，故选A。12A.a baby Ba manCa woman Da white man答案：A由常识可知，胚胎应先成为婴儿。故
50、选A。13A.died BappearedCturned Dwere答案：B由语境并结合常识可知Dolly是在1997年出现(appear)的。故选B。14A.questions BaffairsCbusiness Dproblems答案：D由上一句表述内容可知，克隆人类胚胎已经没有技术难题了，A项为“问题”，B项为“事务”，C项为“生意”，D项为“难题”。故选D。15A.egg Bbless Cmeat Dcell答案：A由下文的“the egg began to”，可知选A。16A.Before BAfter CWhile DAnd答案：B此处表述在it was given DNA之后，
51、the egg开始生长。故选B。17A.grow Bdie Cchange Drise答案：Aegg开始生长，grow “生长”符合语境。故选A。18A.created Bstopped Callowed Dasked答案：BBut引出转折关系表明egg本应该是继续生长，但是却被阻止(stopped)发育成婴儿。故选B。19A.yet Bstill Cnot Dalso答案：B由第五段中的“a set of cells”可知，egg停止生长以后仍然处于a ball of cells的阶段。故选B。20A.different Busual Cordinary Dsame答案：D由上下文可知，是同
52、样的技术已经被用到了克隆羊，牛以及猴子身上了。故选D。阅读理解With only about 1,000 pandas left in the world, China is desperately trying to clone (克隆) the animal and save the endangered species (物种). Thats a move similar to what Texas A & M University researchers have been undertaking for the past five years in a project called
53、“Noahs Ark”Noahs Ark is aimed at collecting eggs, embryos (胚胎), semen (精液) and DNA of endangered animals and storing them in liquid nitrogen (氮). If certain species should become extinct, Dr Duane Kraemer, a professor in Texas A & Ms College of Veterinary Medicine, says there would be enough of the
54、basic building blocks to reintroduce the species in the future.It is estimated that as many as 2,000 species of mammals, birds, reptiles will become extinct in over 100 years. The panda, native only to China，is in danger of becoming extinct in the next 25 years.This week, Chinese scientists said the
55、y grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal.The entire procedure could take from three to five years to complete.“The nucleus transfer (核子移植) of one species to another is no
56、t easy, and the lack of available (capable of being used) panda eggs could be a major problem，” Kraemer believes. “They will probably have to do several hundred transfers to result in one pregnancy (having a baby). It takes a long time and its difficult, but this could be groundbreaking science if i
57、t works. They are certainly not putting any live pandas at risk, so it is worth the effort，” adds Kraemer, who is one of the leaders of the Project at Texas A & M, the firstever attempt at cloning a dog. “They are trying to do something thats never been done, and this is very similar to our work in
58、Noahs Ark. Were both trying to save animals that face extinction. I certainly appreciate their effort and theres a lot we can learn from what they are attempting to do. Its a research that is very much needed.”篇章导读：本文是一篇说明文。讲述中国正在竭力克隆濒临绝种的熊猫，这和Texas A & M University的Noahs Ark(诺亚方舟)工程极为相似，都是想拯救濒临灭绝的动
59、物。1. The aim of “Noahs Ark” project is to _.Amake efforts to clone the endangered pandasBsave endangered animals from dying outCcollect DNA of endangered animals to studyDtransfer the nucleus of one animal to another答案：B推理判断题。从第二段内容可知，“诺亚方舟”工程的目标是把濒临灭绝的动物的蛋(卵)、胚胎、精液和DNA储存在液体氮中，如果某一种动物濒临灭绝时，将来可以重现这一动
60、物。2According to Dr Kraemer, the major problem in cloning pandas would be the lack of _. Aavailable panda eggs Bhost animals Cqualified researchers Denough money答案：A细节理解题。从第六段第一句中的“The nucleus transfer (核子移植) of one species to another is not easy, and the lack of available (capable of being used) pan
61、da eggs could be a major problem”可知选A。3The best title for the passage may be _.AChinas Success in Cloning PandasBThe First Cloned Panda in the WorldCExploring the Possibility to Clone PandasDChinathe Native Place of Pandas Forever答案：C标题判断题。从文章内容来看，无论是中国还是世界克隆熊猫都没有成功，所以排除A、B两项；D项内容明显与文章内容不符，故排除。所以“探索
62、克隆熊猫的可能性”应该是这篇文章的标题。4From the passage we know that_.AKraemer and his team have succeeded in cloning a dogBscientists try to implant a panda egg into a rabbitCKraemer will work with Chinese scientists in clone researchesDabout two thousand species will probably die out in over a century答案：D推理判断题。此题B项
63、的干扰性较强，但由于它没有说明是Chinese scientists，所以应排除。A、C两项明显与原文不符。根据文章第三段第一句可知答案为D。短文改错A survey basing on 1,000 students found that 80% of senior students slept less than nine hours every night. Too much homework being given by school teachers is the main cause. Another main cause lies at students bad habits. S
64、ome students are absentminded while do their homework, and some wasting their afterclass time. The third cause is some students have to get up earlier on weekdays to get to school far away from home. Experts suggest the amount of homework for the students been cut down. Besides, teachers should enco
65、urage his students to make good use of their spare time.答案：A survey on 1,000 students found that 80% of senior students slept less than nine hours every night. Too much homework given by school teachers is main cause. Another main cause lies students bad habits. Some students are absentminded while
66、their homework, and some their afterclass time. The third cause is some students have to get up on weekdays to get to school far away from home. Experts suggest the amount of homework for the students cut down. Besides, teachers should encourage students to make good use of their spare time.难项分析：第一处：basingbased考查非谓语动词。be based on意为“基于；根据”，为固定搭配，此处base与其所修饰的词survey之间是被动关系。故应用过去分词based作后置定语。第五处：dodoing考查状语从句的省略。此处为while引导的时间状语从句的省略形式，当从句的主语与主句的主语一致并且从句中含有be动词时，可以省略从句的主语和be动词，该从句补充完整为while they are doing their homework。第九处：beenbe考查虚拟语气。此处suggest作“建议”讲，后面的宾语从句要用虚拟语气，即谓语用“should动词原形”形式，should可以省略。
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