2012年近几年高考英语完形填空分析
2012高考英语,完型填空的解题思路

2012高考英语,完型填空的解题思路完型填空是高考中一个重要题型,其命题形式就是给考生一篇语句连贯的短文,字数通常在200-300词之间,出题者有目的地在每隔10-15个词后去除一处词语,形成20处空缺,然后在相应的空缺处置包括三个干扰项在内的四个备选答案,需要考生从四个选项中选出一个最佳的答案。
在历年高考中完型填空是比较容易失分的题目,虽然看上去也是选择题,但却与语法和词汇的单项选择题大不一样。
完型填空综合考察学生的语言知识、阅读能力和总体语言水平,检查学生在有信息空缺的前提下理解整篇文章的能力,要求通过上下文判断,选择恰当的单词或词组填入空格中,使之成为上下合乎逻辑、语言通顺、意义连贯的文章。
完型填空的解题思路很多同学在做完型填空的时候,喜欢看一题做一题,结果错误率极高,因为他放弃了文章对于每一个空格的限制和约束。
完型填空是一篇语言紧凑,内容严紧的文章,因此绝对不可以脱离文章背景信息,依靠"感觉"或所谓"语感"进行无根据猜测的。
解出完型填空的基本方法实际上就是:通过已知信息破解未知信息。
做好完型填空要按照“三步法” 原则,按部就班的进行1.通读全文,了解大意2.把握全篇,注意语法3.代入检查,提高成绩2005年普通高等学校招生全国统一考试(全国1)One afternoon I was sitting at my favorite table in a restaurant , waiting for the food I had ordered to arrive . Suddenly I 36 that a man sitting at a table near the window kept glancing in my direction , 37 he knew me . The man had a newspaper 38 in front of him , which he was 39 to read , but I could 40 that he was keeping an eye on me . When the waiterbrought my 41 the man was clearly puzzled (困惑)by the 42 way in which the waiter and I 43 each other . He seemed even more puzzled as 44 went on and it became 45 that all the waiters in the restaurant knew me . Finally he got up and went into the 46 . When he came out , he paid his bill and 47 without another glance in my direction .I called the owner of the restaurant and asked what the man had 48 . “Well,” he said , “that man was a detective (侦探) . He 49 you here because he thought you were the man he 50 .” “What ?” I said , showing my51 . The owner continued , “He came into the kitchen and showed me a photo of the wanted man. I 52 say he looked very much like you ! Of course , since we know you , we told him that he had made a 53 .” “Well , it’s really 54 I came to a restaurant where I’m known ,” I said . “ 55 , I might have been in trouble .”36.A.knew B.understood C.noticed D.recognized37.A.since B.even if C.though D.as if38.A.flat B.open C.cut D.fixed39.A.hoping B.thinking C.pretending D.continuing40.A.see B.find C.guess D.learn41.A.menu B.bill C.paper D.food42.A.direct B.familiar C.strange D.funny43.A.chatted with B.looked at ughed at D.talked about44.A.the waiter B.time C.I D.the dinner45.A.true B.hopeful C.clear D.possible46.A.restaurant B.washroom C.office D.kitchen47.A.left B.acted C.sat down D.calmed down48.A.wanted B.tried C.ordered D.wished49.A.met B.caught C.followed D.discovered50.A.was to beat B.was dealing with C.was to meet D.waslooking for51.A.care B.surprise C.worry D.regret52.A.must B.can C.need D.may53.A.discovery B.mistake C.decision D.fortune54.A.a pity B.natural C.a chance D.lucky55.A.Thus B.However C.Otherwise D.Therefore分析:首先通读文章,把握大意:作者一次就餐经历:“我”在一家餐厅吃饭,竟然被侦探认为是嫌疑犯,多亏”我”经常在这家餐厅吃饭,和每个人都很熟,才化险为夷,平安无事。
NMET2012完形填空试题分析和解题技巧共5页

NMET2012完形填空试题分析和解题技巧NMET2012完形填空主要从以下三方面考查考生综合运用语言的能力。
一、依据上下文提供的语境来确定选项的能力NMET2012完形填空试题把具体的语言知识溶进具体的语言情景中,考查考生抓住语境中的直接或间接的暗示或提示,对整体文章进行前后兼顾的逻辑推理能力。
例1: Around twenty years ago, I was living in York. AlthoughI had a lot of experience and a Master’s degree,I couldn’t find1 work1. A. successful B. extraC. satisfyingD. convenient分析:四个选项均为形容词,都可以填在句中作表语,但依据上文“虽然我拥有丰富的经验和博士学位,应用”satisfying 来表达“没有找到一份令人满意的工作”,故选C项。
例2: I was 2 a school bus to make ends meet and 3 with a friend of mine, for I had lost my flat.2. A. driving B. repairingC. takingD. designing3. A. working B. travellingC. discussingD. living分析:第2题根据下文:“to make ends meet” (收支相抵)和“As I pulled the bus over to drop off a little girl(就在我把校车停下,让一个小女孩下车的时候”可知此处应是作者的谋生手段是“开校车”而不是“修车”或“设计车”故选A,而第3题由后面的“for I had lost my flat”(我失去我的公寓)可推知既然没房可住,只好和朋友共住一房,故选D。
2012高考英语试题评析稿

2012年普通高等学校招生全国统一考试(新课标卷)英语试题答案详解第二部分英语知识运用单项选择题答案详解21.【答案】A.【解析】考查情景对话。
句意:---你想要这些中的那一个? ---我不在乎.任何一个都行.此处I don’t mind“我不介意”:I m sure“我确信”;No problem :“没问题”:Go ahead说吧,做吧,干吧!22【答案】C【解析】考查冠词用法。
句意:Sarah满意地看着那幅己经画完的画。
第一空特指“己经画完的画”;第二空考查介词短语with satisfaction.意为:“满意地”作状语。
此处satisfaction为抽象名词,不用冠词。
23【答案】C【解析】考查动词时态。
句意:奶奶过去常常说:“生活就像在雪中行走,因为每一步清清楚楚,明明白白”。
直接引语中,表达的内容是生活哲理.故使用一般现在时.24【答案】D【解析】考查主语从句的连接词。
句意:总统采取什么行动结束这次罢工一点也不清楚,句中it是形式主语,what引导主语从句,作真正的主语。
其中What作do的宾语.25【答案】B【解析】考查状语从句的连接词。
句意:尽管我一定要说你确实看起来眼熟,但我相信我们以前没见过面。
Although“尽管”引导让步状语从句,符合题意。
26【答案】D【解析】考查形容词、副词比较等级的用法. 句意:这结果对我们来说不很重要,但如果我们获胜,那就太好了.此处so much the better(口语)固定搭配,意为“那就太好了”27【答案】B【解析】考查动词短语词义辨析。
句意:Mary 非常擅长在课上记笔记。
她能把她的老师说得每个词都写下来。
此处put out媳灭:put down记下,写下;put away 收拾,把东西放好:put together 把…放在一起。
28【答案】A【解析】考查现在分词的独立主格结构。
句意:如果天气允许,聚会将在花园举行,此处主句的主语party和weather不一致,所以weather保留,作permitting 的逻辑主语,构成独立主格结构。
2012高考英语全国各地完形填空试题及答案解析(答案)

绝密★启用并使用完毕前(1)2012年普通高等学校招生全国统一考试(山东卷)【语篇解读】这是一篇记叙文,叙述的是一对德国夫妇为了帮助无家可归的人所付出的努力,并借主人公之口表达了作者的感受:给予爱,也收获爱,这非常有意义。
36.【答案】B【命题透视】名词词义辨析。
考查学生的词汇量与词汇运用能力。
【试题解析】前面的but表转折,句意为:但是事实上无家可归的到处都有。
句型the truth is that…意为“事实上……”。
37.【答案】D【命题透视】逻辑关系。
考查学生对上下文的理解或对文化、常识的理解和运用能力。
【试题解析】根据上文,此处表达的是“一个像德国这么富有的国家”,与前文的for example和后面的like Germany 一致。
38.【答案】C【命题透视】逻辑关系。
考查学生对上下文的理解或对文化、常识的理解和运用能力。
【试题解析】根据后文,此句句意为:他们为德国首都柏林的无家可归者做饭已经十一年了。
39. 【答案】A【命题透视】动词词义辨析。
考查学生的词汇量与词汇运用能力。
【试题解析】由上句,此处意为:他们从一个漫长而炎热的夏天开始。
上句提到他们为无家可归者提供食物有十一年了,所以此处应该表达何时开始。
其他选项中,met是“遇到”;left是“离开”;called是“打电话;叫”;都不符合句意。
40.【答案】D【命题透视】逻辑关系和副词词义辨析。
考查学生词汇的理解和对上下文的理解或对文化、常识的理解和运用能力。
【试题解析】根据后面的Kurt and his wife stayed at home,此处是用大多数德国人与Kurt夫妇作一对比,句意为:他们从一个漫长而炎热的夏天开始,此时大多数德国人都外出度假了。
41.【答案】B【命题透视】动词短语词义辨析。
考查学生的词汇量与词汇运用能力。
【试题解析】句意为:Kurt和他的妻子呆在家里做三明治,他们在街上布置好桌子,给无家可归者提供食物。
2012_年全国高考英语试题__完形填空范文

even with friends, certainly not with 44 . People from Latin American countries,45 , touch eachAction speaks louder than words.(事实胜于雄辩。
)37. A. sounds B. invitations C. feelings D. messages【答案】D【解析】据专家称:我们的身体发出比我们意识到的更多的信息。
此处sound声音;invitation邀请;feeling 感觉;message信息。
38. A. hope B. receive C. discover D. mean【答案】D【解析】实际上,非语言交际占据了约50%我们真正想表达的意思。
此处hope希望;receive 接收;discover发现;mean表达意思。
39. A. immediate B. misleading C. important D. difficult【答案】C【解析】当我们进行跨文化交流时,身势语显得尤为重要。
此处immediate立刻;misleading 误导的;important重要的;difficult困难的。
40. A. well B. far C. much D. long【答案】C【解析】身势语是被我们事实上常常忽视的很大的一部分。
41. A. For example B. Thus C. However D. In short【答案】A【解析】文章以拉丁美洲人和挪威人为例,说明不同的社会群体对待距离的态度是不同的。
42. A. trade B. distance C. connections D. greetings【答案】B【解析】不同的社会群体对待人们之间接触的距离是不同的。
此处trade交易;distance 距离;connection 联系;greeting问候。
2012年高考英语汇总完形填空

2012年普通高等学校招生全国统一考试英语试题解析(重庆卷)第二节完形填空(共20小题;每小题1.5分,满分30分)请阅读下面短文,掌握其大意,然后从36-55各题所给的四个选项(A、B、C、D)中,选出最佳选项,并在答题卡上将该选项的标号涂黑。
I became a gardener when I was twelve. My early__36___of gardening may not have originate from my love for nature. It was to _37__my parents.At that time, we had a big yard in which a beautiful maple tree stood. But my mother often looked with __38___at this work of natural art. Those golden leaves seemed like tons of rubbish her,“something else to __39__!”Seeing the neighbors busy with gardening, my father ever thought it a waste of time.At that age, I always did something__40___to whatever my parents did! If gardening were something they found__41__, I would plant a garden!I planted some lily(百合花)seeds in the yard. But they failed to _42___.I continued to sunflower seeds and roses, Wild __43__joy,I found the first rose bloom(开花).One by one, the flowers bloomed their heads off.__44___, I was touched by this land of wonder.___45__, my parents showed no interest in my garden. My father even__46___at me because found it was __47__to move around my garden to the driveway. To my mother’s __48__,I put her vase my real roses which, in her eyes, were simply weeds__49__flowers.Regardless of their __50__, I kept on planting my garden and _51__to enjoy the pleasure gardening. Plants make such good companions: they breathe, they bloom, they___52__to care and love.It has been many years since I made my first garden out of my desire to __53___my parent .Today I become known as Mrs. Greenthumbs, teaching gardening and hosting a gardening show which makes my parents feel very__54_.And now I could say it is my affection for___55__they makes me a real gardener.36. A. memory B. dream C. intention D. design37. A. please B. change C. help D. annoy38. A. doubt B. appreciation C. surprise D. excitement39. A. collect up B. care about C. clean up D. come in40. A. equal B. similar C. superior D. opposite41. A. painful B. valuable C. upsetting D. interesting42. A. come up B. break out C. hold on D. get through43. A. to B. with C. in D. by【考点】记叙文【文章大意】作者小时候出于反叛心理,在院子里种花,结果最终喜欢了园艺,后来作者在这方面做出了成绩,成为一名真正的园艺师,使当初持反对意见的父母为之倍感自豪。
2012高考英语完形填空答案详解

2012高考英语完形填空答案详解安徽卷When I settled in Chicago,my new city seemed so big and unfriendly, Then I had a 36 problem and had to go to hospital for a 37 examination.It seemed a small 38 compared to the one I was about to face ,but things started to go 39 right from the beginning , Not having a car or 40 the city, I was depending on a couple of buses to get me from A to B, 41 I’d left myself plenty of time, soon it was 42 I was going to be late, as I had mistakenly boarded a bus that was taking me in the 43 direction.I 44 the bus and stood on the pavement not knowing what to do, I look into the eyes of a 45 who was trying to get past me, 46 instead of moving on ,she stopped to ask if I was 47 , After I explained my 48 to her, she pointed to a bus stop across the street , where a bus would take me back into the city to my 49 . Sitting there waiting , I felt 50 that someone had been willing to help . 51 , hearing a horn (喇叭)nearby, I looked up to see a car with my new friend 52 at me to get in, She had returned to offer me a 53 to the hospital.Such unexpected 54 from a passer-by was a lovely gift to receive, As I climbed out of the car at the hospital and turned to thank her, she smiled and told me not to lose 55 ,for all things are possible.36. A. physical B. traveling C. social D.housingA 后面说不得不去医院37. A. scientific B.final C.previous D. ThoroughD A 表示科学检查B 表示最终检查C 表示“以前的”,D表示“全面的”38. A. chance B. challenge C. success D.error与后面的face相匹配39. A. wrong B. easy C. fast D. Ahead与前面的go 构成词组,表示出错了。
2012年高考英语完形填空大全解析版

2012年高考英语完形填空大全2012年普通高等学校招生全国统一考试英语(北京卷)InspirationI said this after seeing the Capital Dancing Company“Mama, when I grow up, I’m going to be one of those!” perform when I was three. It was the first time that my __36__ took on a vivid form and acted as something importantto start my training. As I grew older and was __37__ to more, my interests in the world of dance __38__ varied but that39__ in the company never left me. In the summer of 2005 when I was 18, Ilittle girl’s dream of someday becoming a __received the phone call which made that dream a __40__; I became a member of the company __41__ back to 1925.As I look back on that day now, it surely __42__ any sense of reality. I believe I stayed in a state of pleasant disbelief__43__ I was halfway through rehearsals (排练) on my first day. I never actually __44__ to get the job. After beingoffered the position, I was completely __45__. I remember shaking with excitement.Though I was absolutely thrilled with the change, it did not come without its fair share of __46__. Through the strict rehearsal period of dancing six days a week, I found it vital to __47__ up the material fast with every last bit of concentration. It is that extreme __48__ to detail (细节) and stress on practice that set us __49__. To then follow thosehigh-energy rehearsals __50__ a busy show schedule of up to five performances a day, I discovered a new __51__ of the What I thought were my physical __52__ were pushed much further than I thought __53__. I words “hard w ork.” learned to make each performance better than the last.Today, when I look at the unbelievable company that I have the great __54__ of being a part of, not only as a member, but as a dance captain, I see a __55__ that has inspired not only generations of little girls but a splendid company that continues to develop and grow-and inspires people every day to follow their dreams.36. A. hobby B. plan C. dream D. word37. A connected B. expanded C. exposed D. extended38. A. rarely B. certainly C. probably D. consistently39. A. director B. trainer C. leader D. dancer40. A. symbol B. memory C. truth D. reality41. A. bouncing B. dating C. turning D. tracking42. A. lacks B. adds C. makes D. brings43. A. while B. since C. until D. when44. A. Cared B. Expected C. Asked D. Decided45. A. motivated B. relaxed C. convinced D. astonished46. A. challenges B. profits C. advantages D. adventures47. A. put B. mix C. build D. pick48. A. Attention B. association C. attraction D. adaptation49. A. apart B. aside C. off D. back50. A. over B. by C. with D. beyond51. A. function B. meaning C. expression D. usage52. A. boundaries B. problems C. barriers D. efforts53. A. necessary B. perfect C. proper D. possible54. A. talent B. honor C. potential D. responsibility55. A. victory B. trend C. tradition D. desire36. C。
- 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。
近几年高考英语完形填空分析提纲:(一)命题趋势(二) 完形填空的题型特点及选项设计特点(三) 完形填空的解题步骤(四) 突破完形的注意事项及突破(一)体裁多样化从图表我们可以看出全国卷的完形填空的体裁多为记叙文、或夹叙夹议。
但其他地方说明文也有出现。
2008年福建卷、安徽卷2009年上海、重庆、福建卷等就是说明文。
2009年甚至还出现了应用文,如安徽卷,即以独特的书信体来命题。
(二)词汇量大幅度增大从2008年开始,考试说明取消了对完形填空词数的限制。
事实上,近两年完形填空所选文章都已超出了原规定200一250的词数限制.大部分篇幅的字数都大约300字。
2009年完形填空词量超过300词的有l0套,其中湖南卷更是达到了381个词。
2010年山东卷有325个单词,加上选项190个,总共是515词,需要在20分钟内完成。
(三)对词汇的要求提高了(1)考察基础词汇中一词多义的现象提高了现在的完形填空题基本上涉及语法问题很少,今年全国卷的完形填空仍然遵循了这一原则。
从选项设置的词汇看,基本上都是基础词汇。
一般说来,基础词汇的词义容量比较大,但一词多义现象在基础词汇上表现非常明显,这是全国卷今年的完形填空题考察的趋势。
(2)考察多种词义辨析手段完形填空的考察角度是在文章理解基础上的词义辨析,全国卷的这篇完形填空用到了多种词义辨析手段,如利用构词法中的派生法辨析词义等,这对今后的词汇教学是有启示的。
(3)难度稳中有增。
历年英语高考中完形填空是相对难度较大的题目。
但多年来其难度一直能够得到较好的控制(一般难度值在0.55-0.6左右,难度略低于整体试卷难度),但近年来该题的难度值因为加大了词汇量,使长句难句增多,选项中所用词汇更加富有层次、更具有干扰性,因此难度也就自然增大了。
二、(一)完形填空的题型特点近几年来的完形填空题,有以下几个特点:1. 短文难度基本稳定,与高中英语教材课文难易基本相当。
2. 短文选材一般为故事性文章,采用其他题材的文章还是不具有普遍性。
但往往不按时间顺序平铺直叙,有插叙或倒叙,有时还夹有描述和议论。
3. 短文的第一句不设空格,提供给考生一个思路,以便考生做题。
4. 考查内容主要是逻辑上的通顺,极少是考语法,所以每题四个选项大多属同一语法范畴。
5. 短文长度基本稳定,一般都是300多个单词。
(二)完形填空选项设置的几个特点(2011年全国卷卷完形选项设置):In our discussion with people on how education can help them succeed in life, a woman remembered the first meeting of an introductory__36__course about 20 years ago.The professor __37__the lecture hall, placed upon his desk a large jar filled with dried beans(豆), and invited the students to _38_how many beans the jar contained. After __39__shouts of wildly wrong guesses the professor smiled a thin, dry smile, announced the __40__ answer, and went on saying, ”Y ou have just __41__an important lesson aboutscience. That is Never__42__ your own senses.”Twenty years later, the __43__could guess what the professor had in mind. He __44__himself, perhaps, as inviting his students to start an exciting __45__into an unknown world invisible(无形的)to the 46 ,which can be discovered only through scientific 47 . But the seventeen-year-old girl could not accept or even 48 the invitation. She was just 49 to understand the world. And she 50 that her firsthand experience could be the 51 .The professor, however, said that it was 52 .He was taking away her only 53 for knowing and was providing her with no substitute. “I remember feeling small and 54 ,”the women says,“and I did the only thing I could do. I 55 the course that afternoon, and I haven’t gone near science since.”36.A.art B.history C.science D.math 37.A.searched for B.looked at C.got through D.marched into38.A.count B.guess C.report D.watch 39.A.warning B.giving C.turning away D.listening to 40.A.ready B.possible C.correct D.difficult 41.A.learned B.prepared C.taught D.taken 42.A.lose B.trust C.sharpen D.show 43.A.lecturer B.scientist C.speaker D.woman 44.A.described B.respected C.saw D.served 45.A.voyage B.movement C.change D.rush 46.A.professor B.eye C.knowledge D.light 47.A.model B.senses C.spint D.methods 48.A.hear B.make C.present D.refuse 49.A.suggesting B.beginning C.pretending D.waiting 50.A.believed B.doubted C.proved D.explained 51.A.growth B.strength C.faith D.truth 52.A.firm B.interesting C.wrong D.acceptable 53.A.task B.tool C.success D.connection 54.A.cruel B.proud C.frightened D.brave 55.A.dropped B.started C.passed D.missed36.C.考查名词,由第二段最后教授说的话可知,这是一节关于自然科学的课,因此填science。
37.D.考查动词词组辨析,教授走近教室,把一个盛满豆子的坛子放在讲桌上。
marchinto “走进去”。
38.B.考查动词,根据第二段第二句中的wrong guesses可知此空填guess。
教授先让同学们猜坛子里有多少豆子。
39.D.考查动词,听了(listening to)同学们的瞎猜后,教授笑了……40.C.考查形容词,教授公布了正确(correct)答案。
41.A.考查动词,接着,他说:“你们刚刚学习(learned)了关于自然科学的重要一课。
”42.B.考查动词,那就是:永远不要相信(trust)你们的感觉。
上文教授让同学们猜一猜坛子里有多少豆子,可是大家凭感觉猜的结果并不正确,故此处用trust。
43.D.考查名词,文章第一句提到一位女士(woman)讲述了自己第一次上自然科学课的经历,故选D。
44.C.考查动词,他认为(saw)自己正把学生引入求知的旅途。
45.A.考查名词,参见上题解析。
本句是比喻。
教授引导学生学习自然科学,就像是开始了激动人心的旅程(voyage)。
46.B.考查名词,那些只是就像隐藏在坛子里的豆子,是肉眼(eye)看不见的。
47.D.考查名词,只有通过科学的方法(methods)才能发现未知世界的奥秘。
48.A.考查动词作者再次采用了比喻的手法。
那天,教授给学生演示学习自然科学的方法,就像是发出了邀请函,请同学们和他一起踏上征程,探索未知的世界。
可是,那个17岁的小姑娘,既没接受,也没听到(hear)老师的邀请。
49.B.考查动词,她只是刚开始(beginning)了解这个世界。
50.A.考查动词,她相信(believed)第一手的经验是真实可信的。
51.D.考查名词,参见上题解析。
truth“事实,真理”。
52.C.考查形容词,可是,教授却说那是错误的(wrong)。
53.B.考查名词,教授拿走了她唯一的求知工具(tool),但是并未给她提供一个替代品。
54.C.考查形容词,这位女士回忆说:“记得当时我觉得自己非常渺小和恐惧(frightened)”。
55.A.考查动词,“我只做了一件我能做的事情。
那天下午放弃(dropped)了这门课程,此后再也没有走近科学。
”1. 同义、近义词辨析型。
多倾向考查动词、名词、形容词。
(平时要多把这几类词性的词归纳记忆)2. 固定搭配型。
多倾向考查动词介词、副词、名词和形容词典型句子结构的搭配。
3. 常用语法。
时态和语态、从句连词。
4. 根据上下文的逻辑关系确定选项型三、完形填空的解题步骤时间分配:1)通读全文,领会大意(2-3分钟);2)逐句阅读,选出答案 (6-7分钟);3)猜测难点、整体复查(2-3分钟)。
1. 跳过空格、通读全文、把握大意。
先跳过空格,通读试题所给的的短文,获得整体印象,做到弄清文脉、抓住主旨,较好地把握短文大意。
要在阅读理解短文的基础上才开始判定选择,切忌仓促下笔。
2. 结合选项、综合考虑、初定答案。
在理解全文意思的基础上,再结合所给选项细读全文,联系上、下文内容,注意从上、下文的语法结构和词语搭配及从选择项中寻找解题的提示,以词、句的意义为先,再从分析句子结构入手,根据短文意思、语法规则、词语固定搭配等进行综合考虑,对备选项逐一进行分析、比较和筛选,排除干扰项、初步选定答案。