标题-2018-2019学年高中新创新一轮复习英语浙江专版：选修8 Unit 3 强化2次练
标题-2018-2019学年高中新创新一轮复习英语浙江专版：选修8 Unit 1 强化2次练
选修8 Unit 1 强化2次练一、单元基础训练(限时25分钟)Ⅰ.翻译句子1．我们决不应该忽视这些错误。
(by no means放句首引起的倒装)By_no_means_ought_we_to_ignore_the_mistakes.2．大多数学生学习都很努力。
(majority)The_majority_of_students_are_hard-working._3．——你的国籍是什么？——中国。
(nationality)—What's_your_nationality?—Chinese.4．我们党支部昨天吸收了一名新党员。
(take in)Our_Party_branch_took_in_a_new_member_yesterday.5．实践表明，每天运动可以让你减肥。
(indicate)Practice_indicates_that_doing_exercises_every_day_can_make_you_lose_weight._6．我们选出詹姆斯当主席。
(elect)We_elected_James_chairman._7．我觉得我再也无法坚持下去了。
(keep up)I_don't_think_I_can_keep_this_up_any_longer._8．我不知道该怎么办，但那时突然想到了一个主意。
(occur to)I_didn't_know_what_to_do,_but_then_an_idea_suddenly_occurred_to_me.9．中国人口众多，但其中70%是农民。
(percent)The_population_of_China_is_large,_but_70_percent_of_the_population_are_farmers.10．他们靠每周70英镑维持生活。
(live on)They_live_on_￡70/seventy_pounds_a_week._Ⅱ.完形填空There are more than four million American Indians and Alaskan natives in the United States. They __1__ to more than five hundred Indian tribes. Many tribe __2__ live on reservations. These are areas that the United States government __3__ up for native tribes that had lost their lands to European settlers.There are about three hundred Indian reservations in the United States, some of __4__ are larger than American __5__. The United States Interior Department's Bureau of Indian Affairs supervises these territories. Tribes on reservations have limited self-rule.On the __6__，American Indians do not __7__ the same economic and educational success as other Americans. A(n) __8__ study by Harvard University says American Indians generally __9__ less money and have __10__ unemployment than other Americans. The study says theyalso have higher __11__ of disease and die younger than other American groups.The Bureau of Indian Affairs __12__ education services for almost fifty thousand Indian children in 1,084 __13__. Experts from Harvard say college attendance rates among the Indian population is half that of the __14__ population. But, they also say the situation is improving. The experts say the __15__ of Native American Indians __16__ higher education has more than doubled in the last twenty years.Harvard researchers __17__ say that the American Indian economy has __18__ at three times the national rate since 1980s. Some of the __19__ should be owed to expansion of the American Indian gambling industry. More than two hundred Indian tribes have __20__ gambling legal on their reservations. Native American casinos (赌场) and other gaming businesses earn more than twenty billion dollars each year.语篇解读：美国有四百多万美洲印第安人和阿拉斯加人。
标题-2018-2019学年高中新三维一轮复习英语浙江专版：选修八 Unit 4 高考拆组训练
选修八Unit 4 高考拆组训练阅读理解组块专练——练速度(限时：30分钟)Ⅰ.阅读理解AI can still remember it as if it happened yesterday. I was a college freshman and had stayed up most of the night before laughing and talking with friends. Now just before my first class of the day my eyelids were feeling heavier and heavier and my head was drifting down to my desk to make my textbook a pillow. A few minutes’nap time before class couldn’t hurt, I thought.Boom! I lifted my head immediately and my eyes opened wider than saucers. I looked around with my heart beating quickly trying to find the cause of the noise. My young professor was looking back at me with a mischievous,_boyish smile on his face. He had intentionally dropped the pile of textbooks he was carrying onto his desk. “Good morning！”he said, still smiling. “I’m glad to see everyone is awake. Now let’s get started.”For the next hour I wasn’t sleepy at all. It wasn’t from the shock of my professor’s textbook alarm clock either. Instead, it was from the attractive discussion he led. With knowledge and good humor, he made the material come alive. His insights were full of both wisdom and loving kindness. And the enthusiasm and joy which he taught with were contagious (有感染力的). I left the classroom not only wide awake, but a little smarter and a little better as well.I learned something far more important than not sleeping in class that day too. I learned that if you are going to do something in this life, do it well, do it with joy, and make it an expression of your love. What a glorious place this world would be if all of us did our work joyously and well! What a beautiful world we could create if every doctor, teacher, musician, cook, waitress, poet, miner, farmer, and laborer made their work an expression of their love! Don’t sleepwalk through your life then. Wake up! Let your love fill your work and your soul. Life is too short not to live it well.语篇解读：本文通过作者大学第一节课的经历告诉我们：无论从事什么职业，我们都应该带着热情和快乐去做好它。
标题-2018-2019学年高中新三维一轮复习英语浙江专版：选修八 Unit 2 高考拆组训练
选修八Unit 2 高考拆组训练阅读理解组块专练——练速度(限时：30分钟)Ⅰ.阅读理解AThe world-famous British Museum has a secret: a hidden study where anyone can request private viewings of prints and drawings by Rembrandt, Michelangelo and more.On the fourth floor of the British Museum, in a quiet corner, is an ordinary door. I first opened the door a few years ago, and was shown into a room with a glass ceiling and cabinets filled with cardboard boxes. Those boxes hold Britain’s national collection of prints and drawings.Studying a work of art in your own time at a desk is a very different experience from looking at it in a museum or a gallery. It is much closer to how the artists themselves would have viewed their work. I was drawn into the images, which still felt fresh and immediate decades after their creation.I asked the archivist if I could see Michelangelo’s ink drawing of a philosopher. The drawing shows a bearded man holding a round object: perhaps a rock or a glass ball. That the drawing was unfinished made it more interesting. Was the drawing an old man thinking about death, an alchemist weighing a fresh piece of gold, or a philosopher turning over the stone of knowledge?I looked at it until the archivist told me they were about to close for the day.Since that first visit, I have gone back to the study room several times, usually to look at the works from the period I was researching. Very occasionally I asked for the Michelangelo drawing.Although_I_know_that_it_prefers_to_be_in_the_dark,_I_also_like_to_think_that,_every_no w_and_then,_it_enjoyed_being_looked_at.语篇解读：本文是一篇记叙文。
2018-2019学年高中新创新一轮复习英语浙江专版讲义：选修八 Unit 5 Meeting your ancestors
Unit 5 Meeting your ancestors一、刷黑板——词汇全听写(先过识记默写关)Ⅰ.阅读词汇(英译汉)[第一屏听写]1．excavate v t.挖掘；发掘2．mat n. 席子；垫子3．quilt n. 被子；棉被4．beast n. 野兽5．onion n. 洋葱6．skateboard n. 滑板7．yogurt n. 酸乳酪；酸奶[第二屏听写]8．melon n．(各种)瓜9．wrinkle n. 皱纹10．spear n. 矛；枪11．eyebrow n. 眉毛12．arrowhead n. 箭头13．hammer n. 铁锤；锤子14．craftsmanship n. 技艺；手艺；精工细作15．punctuation n. 标点符号Ⅱ.高频词汇(汉译英)[第三屏听写]1．identify v t.确认；识别；鉴别2．alternative n. 可能的选择adj.供选择的；其他的3．archaeology n. 考古学(〈美〉archeology) 4．archaeological adj.考古学的；与考古学有关的(〈美〉archeological) 5．archaeologist n. 考古学家(〈美〉archeologist)[第四屏听写]6．starvation n．挨饿；饿死7．tentative adj.试探性的；不确定的8．accuracy n. 精确；准确9．interrupt v t.&v i.打断……讲话；打岔；暂时中断或中止10．acute adj.有观察力的；敏锐的；严重的；深刻的11．assume v t.假定；设想12．regardless ad v. 不管；不顾[第五屏听写]13．centimetre n．厘米(〈美〉centimeter)14．sharpen v i.&v t.(使)锋利；尖锐；清晰15．sharpener n. 磨具；削具16．kindergarten n. 幼儿园17．ample adj.足够的；充足的；富裕的18．messy adj.凌乱的；脏的19．primitive adj.原始的；远古的；简陋的20．seashell n. 海贝壳[第六屏听写]21．category n．种类；类别；范畴22．botany n. 植物学23．botanical adj.植物学的；与植物学有关的24．analysis n．(pl.analyses) 分析25．ripen v t.&v i.使……成熟；成熟[第七屏听写]26．significance n．意义；意思；重要性；重要意义27．somehow ad v. 以……方式；不知怎么地28．systematic adj.有系统的；有计划的；有条理的29．spit v t.吐出(唾液、食物等)v i.吐痰30．delete v t.删；删除31．album n. 相册；集邮册；唱片[第八屏听写]32．scratch n(刮、抓、划的)痕迹；搔；挠v t.搔；抓；擦伤；刮坏33．academy_ n. 学院；学会；学术团体；院校34．receptionist_ n. 接待员；招待员35．radioactive adj.放射性的；有辐射能的36．radioactivity n. 放射性37．division n. 分割；划分；分配；分界线[第九屏听写]38．pulse v i.强烈而有规律地跳动；搏动n. 脉搏；节拍39．applaud v i.&v t.鼓掌欢迎；赞赏40．howl v t.&v i.嗥叫；叫喊；吼叫n. 长嚎；嗥叫41．accelerate v i.&v t.加速；促进[第十屏听写]42．arrest v t.逮捕；吸引n. 逮捕；拘留43．dizzy adj.头晕目眩的；眩晕的；使人发晕或困惑的44．worship v t.&v i.崇拜；敬奉n. 崇拜；敬神45．skilful adj.有技巧的；熟练的(〈美〉skillful)[第十一屏听写]46．regardless_of_不管；不顾47．at_most 至多；最多48．cut_up 切碎49．fed_up_with 受够了；饱受；厌烦50．look_ahead 向前看；为将来打算51．date_back_(to_...) 追溯到；始于二、刷清单——热身自盘点(再过基本应用关)(一)核心单词(二)常用短语一、过重点单词——纵引横联超人一点1．alternative adj.供选择的；其他的 n ．可能的选择；选择对象 [教材原句] Can you think of the alternatives we would use today? 你能想到我们今天使用的替代品吗？ 单句语法填空①The Internet also provides us with a cheap alternative to communicating (communicate) with others.②In order to succeed, we have no alternative but to_face (face) failure bravely and learn from it. 补全句子③You have_the_alternative_of_speaking_or keeping quiet. 你要么发言，要么保持沉默。
标题-2018-2019学年高中新创新一轮复习英语浙江专版：选修8 Unit 5 强化2次练
选修8 Unit 5 强化2次练一、单元基础训练(限时25分钟)Ⅰ.翻译句子1．恐怕除了向警方告发你以外，我别无选择了。
(alternative)I'm_afraid_I_have_no_alternative_but_to_report_you_to_the_police.2．据我所知，许多人认为他是正确的。
(assume)As_far_as_I_know,_a_great_many_people_assume_him_to_be_right.3．迄今为止，研究尚未产生任何具有重大意义的结果。
(of great significance)So_far,_research_has_not_produced_anything_of_very_great_significance.4．要是我们早来几分钟就好了！(if only)If_only_we_had_come_a_few_minutes_earlier!5．对不起打断你一下，我有话要讲。
(interrupt)Sorry_to_interrupt_you,_but_I_have_something_to_say.6．他不顾危险地去了。
(regardless of)He_went_regardless_of_the_danger.7．警察的职责之一是维持公共秩序。
(preserve)It_is_one_of_the_duties_of_the_police_to_preserve_public_order.8．他决定加快他的课程进度。
(accelerate)He_decided_to_accelerate_his_courses.9．令他大感欣慰的是，最后他失踪的儿子被警察找到了。
(to one's relief)Much_to_his_relief,_finally_his_lost_son_was_found_by_the_police.10．我一直在等我父母的来信。
标题-2018-2019学年高中新三维一轮复习英语浙江专版：选修八 Unit 1 A land of diversity
Unit 1 A land of diversity一、单词表词汇全查验——运用多媒体，提问默写词汇Ⅰ.阅读词汇(英译汉)[第一屏听写]1．strait n．海峡2．Arctic adj. 北极的；北极区的3．the Arctic 北极4．ministry n. (政府的)部；(全体)牧师；牧师的职责5．federal adj. 联邦制的；联邦政府的[第二屏听写]6．nephew n．侄子；外甥7．aircraft n. 飞行器；航空器；飞机8．vice n．& adj. 代理；副职9．shave v t.&v i. 刮；剃10．tram n. (有轨)电车11．bakery n. 面包房；面包厂[第三屏听写]12．ferry n．渡船；渡口v t. 摆渡；渡运13．seagull n. 海鸥14．cattle n. 牛(总称)15．mourn v t.&v i. 哀悼；悼念；表示悲痛16．authority n. 权威；权力(pl.) 当局；官方Ⅱ.高频词汇(汉译英)[第四屏听写]1．distinct adj.清晰的；明显的；明确的2．distinction_ n. 差别；区分；卓著3．immigrant n. (从外国移入的)移民4．immigrate v i. 移入(外国定居)5．immigration n. 移民；移居入境6．means_ n. 手段；方法7．majority_ n. 大多数；大半[第五屏听写]8．despite prep.尽管；不管9．hardship n. 苦难；困苦10．elect v t. 选择；决定做某事；选举某人11．boom n. (人口、贸易的)繁荣v i. 处于经济迅速发展时期12．racial adj. 人种的；种族的13．crossing n. 横渡；横越；十字路口；人行横道[第六屏听写]14．rail n．铁路；扶手；(护栏的)横条15．percentage n. 百分比；百分率16．pole n. 地极；电极；磁极17．applicant n. 申请人18．customs n. 海关；关税；进口税19．socialist n. 社会主义者；社会党人adj. 社会主义者的[第七屏听写]20．socialism n．社会主义21．occur v i. 发生；出现22．indicate v t. 指出；标示；表明；暗示23．luggage n. 行李(〈美〉baggage) 24．apparent adj. 显而易见的；显然的；表面上的25．apparently ad v. 显然地；显而易见地26．brake n. 闸；刹车；制动器v i.&v t. 刹(车)；用制动器减速[第八屏听写]27．conductor n．(公车)售票员；列车员；(乐队)指挥28．slip v i. 滑动；滑行；滑跤n. 滑动；滑倒29．hire v t.& n. 租用；雇用30．fascinating adj. 迷人的；吸引人的31．angle n. 角；角度32．nowhere ad v. 无处；到处都无[第九屏听写]33．punishment n．处罚；惩罚34．justice n. 正义；公平35．civil adj. 公民的；国内的；民间的36．reform v t.&v i. 改革；革新n. 改革；改造；改良37．grasp v t.& n. 抓住；抓紧；掌握；领会38．thoughtful adj. 关切的；体贴的；深思的[第十屏听写]39．insert v t.插入；嵌入40．thankful adj. 感激的；感谢的41．a_great/good_many 许多；很多42．keep_up 坚持；维持；沿袭(风俗、传统等) 43．live_on 继续存在；继续生存44．by_means_of_... 用……办法；借助……[第十一屏听写]45．make_a_life习惯于新的生活方式、工作等46．back_to_back 背靠背47．apply_for 申请；请示得到48．mark_out 用线画出范围；标出……界线49．take_in 包括；吸收50．team_up_with 与……合作或一起工作二、单元核心考点初热身——提供语境，单元考点自测回顾(一)分类识记单词——用时少·功效高⇩积得多(平时多输入，用时顺手出)(二)语段串记短语——不枯燥·兴趣高⇩积得多(平时多输入，用时顺手出)(三)仿写用活句式——造佳句·表达高1．majority n ．大多数；大半 [多角练透] 单句语法填空①A majority of Africans are (be) forced to work for the Europeans.②The majority of the land has_been_destroyed (destroy) so far.③I hope to gain a bit more knowledge of gardening so that it can help me to major in the gardening after attending college.补全句子④The white are in_the_majority in Australia while the native people in_the_minority.在澳大利亚，白人占多数而土著人占少数。
2018-2019学年高中新创新一轮复习英语浙江专版讲义：选修八 Unit 2 Cloning Word版含答案
Unit 2 Cloning一、刷黑板——词汇全听写(先过识记默写关)Ⅰ.阅读词汇(英译汉)[第一屏听写]1．twin n．双胞胎之一；孪生儿之一adj.成对的；成双的2．straightforward adj.简单的；直接的；坦率的3．carrier n. 携带者；搬运工；运输工具4．arbitrary adj.任意的5．fate n. 命运；天命[第二屏听写]6．medium n．(pl.media)媒介；手段；工具7．the media 大众传播媒体(如电视、报纸等) 8．conservative adj.保守的；守旧的9．constitution n. 宪法；章程10．compulsory adj.必须做的；义务的；强迫的；强制的11．opera n. 歌剧；歌剧团；歌剧院[第三屏听写]12．chorus n．合唱；合唱队13．loaf n. 一条(面包)14．flour n. 面粉15．claw n. 爪；脚爪16．turkey n. 火鸡17．feather n. 羽毛Ⅱ.高频词汇(汉译英)[第四屏听写]1．differ v i.不同；相异2．exact adj.精确的；准确的3．identical adj.同一的；一模一样的4．commercial_ adj.商业的；贸易的5．complicated adj.复杂的；难懂的6．undertake v t.着手；从事；承担7．breakthrough n. 突破[第五屏听写]8．procedure n．程序；步骤；手续9．cast v t.扔；投；掷10．altogether ad v. 总共；完全地11．correction n. 改正；纠正；修正12．object v i.反对；不赞成13．objection n. 不赞成；反对；异议14．obtain v t.获得；赢得[第六屏听写]15．attain v t.获得；到达(水平、年龄、状况等) 16．forbid v t.禁止；不准17．accumulate v t.&v i.积累；聚积18．owe v t.欠(账、钱、人情等)；归功于……19．shortly ad v. 立刻；不久20．retire v i.退休；离开[第七屏听写]21．bother v t.打扰v i.操心n. 烦扰22．assumption n. 假定；设想23．regulation n. 规则；规章；法规24．popularity n. 受人喜爱；流行25．strike_ v t.&v i.打；撞击；罢工n. 罢工[第八屏听写]26．adore v t.崇拜；爱慕；喜爱27．hatch v t.&v i.孵出；孵卵；孵化28．reasonable adj.合情理的；讲道理的；公道的29．resist v t.抵抗；对抗30．drawback n. 缺点；不利条件31．merely ad v. 仅；只；不过32．decoration n. 装饰[第九屏听写]33．unable adj.不能的；不会的34．initial adj.最初的；开始的35．impact n. 撞击；冲击；巨大的影响36．moral adj.道德(上)的；伦理的37．vain adj.虚荣的；自负的；徒劳的38．in_vain 白费力气；枉费心机39．(be)_bound_to_(do)．.. 一定或注定(做)……[第十屏听写]40．strike_..._into_one's_heart使……刻骨铭心41．from_time_to_time_ 不时；偶尔42．bring_back_to_life 使复生；使复活43．in_favour_of 赞成；支持44．in_good/poor_condition 状况很好(坏)；情况很好(坏) 45．cast_down 使失望；使沮丧46．pay_off 得到好结果；取得成功；偿清二、刷清单——热身自盘点(再过基本应用关) (一)核心单词(二)常用短语(三)经典句式一、过重点单词——纵引横联超人一点1．object vi.反对；不赞成[经典例句] Unless our manager objects to Tom's joining the club, we shall accept him as a member.我们愿意接受汤姆为俱乐部的成员，除非经理反对他加入本俱乐部。
2018-2019学年高中新创新一轮复习英语浙江专版讲义：选修八 Unit 1 A land of diversity Word版含答案
Unit 1 A land of di v ersity一、刷黑板——词汇全听写(先过识记默写关)Ⅰ.阅读词汇(英译汉)[第一屏听写]1．strait n．海峡2．Arctic adj.北极的；北极区的3．the Arctic 北极4．ministry n. (政府的)部；(全体)牧师；牧师的职责5．federal adj.联邦制的；联邦政府的[第二屏听写]6．nephew n．侄子；外甥7．aircraft n. 飞行器；航空器；飞机8．vice n．& adj.代理；副职9．shave v t.&v i.刮；剃10．tram n. (有轨)电车11．bakery n. 面包房；面包厂[第三屏听写]12．ferry n．渡船；渡口v t.摆渡；渡运13．seagull n. 海鸥14．cattle n. 牛(总称)15．mourn v t.&v i.哀悼；悼念；表示悲痛16．authority n. 权威；权力(pl.) 当局；官方Ⅱ.高频词汇(汉译英)[第四屏听写]1．distinct adj.清晰的；明显的；明确的2．distinction_ n. 差别；区分；卓著3．immigrant n. (从外国移入的)移民4．immigrate v i.移入(外国定居)5．immigration n. 移民；移居入境6．means_ n. 手段；方法7．majority_ n. 大多数；大半[第五屏听写]8．despite prep.尽管；不管9．hardship n. 苦难；困苦10．elect v t.选择；决定做某事；选举某人11．boom n. (人口、贸易的)繁荣v i.处于经济迅速发展时期12．racial adj.人种的；种族的13．crossing n. 横渡；横越；十字路口；人行横道[第六屏听写]14．rail n．铁路；扶手；(护栏的)横条15．percentage n. 百分比；百分率16．pole n. 地极；电极；磁极17．applicant n. 申请人18．customs n. 海关；关税；进口税19．socialist n. 社会主义者；社会党人adj.社会主义者的[第七屏听写]20．socialism n．社会主义21．occur v i.发生；出现22．indicate v t.指出；标示；表明；暗示23．luggage n. 行李(〈美〉baggage) 24．apparent adj.显而易见的；显然的；表面上的25．apparently ad v. 显然地；显而易见地26．brake n. 闸；刹车；制动器v i.&v t.刹(车)；用制动器减速[第八屏听写]27．conductor n．(公车)售票员；列车员；(乐队)指挥28．slip v i.滑动；滑行；滑跤n. 滑动；滑倒29．hire v t.& n. 租用；雇用30．fascinating adj.迷人的；吸引人的31．angle n. 角；角度32．nowhere ad v. 无处；到处都无[第九屏听写]33．punishment n．处罚；惩罚34．justice n. 正义；公平35．civil adj.公民的；国内的；民间的36．reform v t.&v i.改革；革新n. 改革；改造；改良37．grasp v t.& n. 抓住；抓紧；掌握；领会38．thoughtful adj.关切的；体贴的；深思的[第十屏听写]39．insert v t.插入；嵌入40．thankful adj.感激的；感谢的41．a_great/good_many 许多；很多42．keep_up 坚持；维持；沿袭(风俗、传统等) 43．live_on 继续存在；继续生存44．by_means_of_... 用……办法；借助……[第十一屏听写]45．make_a_life习惯于新的生活方式、工作等46．back_to_back 背靠背47．apply_for 申请；请示得到48．mark_out 用线画出范围；标出……界线49．take_in 包括；吸收50．team_up_with 与……合作或一起工作二、刷清单——热身自盘点(再过基本应用关) (一)核心单词一、过重点单词——纵引横联超人一点1．majority n ．大多数；大半[教材原句] Of the first Spanish to go to California, the majority were religious men, whose ministry was to teach the Catholic religion to the natives.在首批移居加州的西班牙人中，大部分是宗教人士，他们的职责是向原住民传授天主教。
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选修8 Unit 3 强化2次练一、单元基础训练(限时25分钟)Ⅰ.翻译句子1．应当教育孩子分辨好坏。
(distinguish ... from ...)Children_should_be_taught_to_distinguish_right_from_wrong._2．似乎你是第一个到这儿的。
(seem as if)It_seems_as_if_you_are_the_first_one_here.3．她一到家就开始准备午饭。
(set about)As_soon_as_she_got_home,_she_set_about_preparing_lunch.4．你明天开工方便吗？(convenient)Will_it_be_convenient_for_you_to_start_work_tomorrow?5．吉姆习惯于早上早起。
(be used to)Jim_is_used_to_getting_up_early_in_the_morning.6．他们正在进行癌症起因的研究。
(research into/on)They_are_carrying_out_a_research_into/on_the_causes_of_cancer.7．如果你不专心学习的话，你绝不可能通过考试。
(never放句首)Never_can_you_pass_the_exam_if_you_don't_devote_yourself_to_your_study.8．直到他完成了作业，他才上床睡觉。
(not ... until的强调句)It_was_not_until_he_finished_his_homework_that_he_went_to_bed.9．大多数家庭在那场战争中经历了很多(苦难)。
(go through)Most_families_went_through_a_lot_in_the_war.10．当被提供帮助时，我们应该说“谢谢你”。
(过去分词作状语)When_offered_help,_we_should_say_“thank_you”．Ⅱ.完形填空Resealable (可密封的) plastic bags — sometimes called by a brand name, such as Ziploc®—are those little clear plastic bags you use to keep your sandwiches and chips fresh. They usually have some sort of sealing mechanism, like a plastic zipper, which allows you to seal the bag to keep __1__ out.Keeping air away from __2__ allows them to stay fresh longer. Bacteria and other organisms in the air will __3__ food items over time if allowed to come into __4__ with them. Sealed plasticbags keep these organisms __5__ getting to your food.Resealable plastic bags can be used for more than just __6__ sandwiches, chips and snacks to school for lunch. They're also used to keep leftovers __7__ in the refrigerator. Many people also use them to __8__ food in the freezer for use in the future.The __9__ of the resealable plastic bag started out in 1951 at a company named Flexigrip, Inc. Flexigrip __10__ a plastic zipper from patents which was bought from __11__ Borge Madsen. These zippers were __12__ used as parts of binders and briefcases.Over time, __13__，plastic zipper bags were developed. Eventually, in 1968, Dow Chemical Company __14__ to market its Ziploc® brand of resealable plastic bags to grocery stores. They turned out to be very __15__.Today, these types of bags are __16__ in many different sizes and styles, from snack and sandwich bags to craft and freezer bags. You can also buy bags with expandable bottoms that __17__ on their own. Some bags even allow you to __18__ food in the microwave!However, now many people try to use __19__ plastic because of its effect on the environment. So manufacturers of resealable plastic bags have taken __20__ to become more environmentally friendly.语篇解读：本文主要介绍了可密封塑料袋的用途及发展史。
同时指出，为了减少污染，这种塑料袋的生产厂家也采取措施以使他们的产品更加环保。
1．A.air B．waterC．dust D．fog解析：选A由第二段开头的“Keeping air away”可知，此处指把空气阻挡在外面。
2．A.plants B．containersC．bags D．foods解析：选D根据下文中的“Bacteria and other organisms in the air will __3__ food items over time”可知，此处指让空气和食物隔离，以便食物保鲜的时间长些，故选foods。
3．A.bring in B．take outC．break down D．deal with解析：选C空气中细菌和其他微生物会分解食物导致食物变质。
break down意为“分解”。
4．A.relation B．contactC．connection D．contract解析：选B如果细菌和其他微生物与食物接触，食物将会很快变质。
contact意为“接触”；relation意为“关系”；connection意为“连接”；contract意为“合同”。
5．A.from B．againstC．through D．beyond解析：选A keep ... from ...为固定搭配，意为“阻止……”。
6．A.following B．presentingC．supplying D．transporting解析：选D下文中的“to school for lunch”说明，此处指携带食物到学校。
7．A.wet B．freshC．thin D．hard解析：选B根据句中的“in the refrigerator”及生活常识可知，它们也被用来保持剩余的食物新鲜。
8．A.store B．cookC．share D．produce解析：选A本段主要介绍可密封塑料袋能用来保存食物，因此这里指储存食物。
9．A.result B．humourC．history D．success解析：选C根据下文中的“started out in 1951 at a company named Flexigrip, Inc”可知，此处提到这种可密封塑料袋的历史。
10．A.discovered B．developedC．spread D．approved解析：选B此处表示买了专利以后，研发了塑料拉链。
11．A.writer B．teacherC．doctor D．inventor解析：选D句中patents说明，博尔格·马森是一位发明家。
12．A.eventually B．frequentlyC．originally D．naturally解析：选C根据下文中的“Over time, __13__，plastic zipper bags were developed.”可知，此处谈的是塑料拉链袋的最初情况，故选originally。
eventually意为“终于”。
13．A.however B．besidesC．therefore D．otherwise解析：选A最初，塑料拉链袋的用途很少，后来它得到了发展。
此处表示转折。
14．A.agreed B．beganC．promised D．preferred解析：选B最后，陶氏化学公司开始将塑料拉链袋投入市场。
15．A.necessary B．famousC．funny D．popular解析：选D文章介绍了这种塑料袋的发展。
它也很受欢迎。
16．A.precious B．expensiveC．available D．fashionable解析：选C根据“in many different sizes and styles, from snack and sandwich bags to craft and freezer bags”可知，这些袋子有很多不同的尺寸和样式，在很多地方可以使用。
17．A.move B．standC．float D．remain解析：选B根据句中的“bags with expandable bottoms”可知，袋子底部可伸展，因此它能竖起来。
18．A.heat B．tasteC．find D．purchase解析：选A根据“in the microwave”可知，把食物放入微波炉中，为的是给食物加热。