历届高考试题中的状语从句
十年高考(2003-2013)英语试题分类解析 状语从句
十年高考2013最新命题题库大全2003-2013高考英语试题分类解析状语从句1.【2013陕西18】I have heard a lot of good things about you______ I came back from abroad.A. sinceB. untilC. beforeD. when【答案】A【解析】考查状语从句。
Since“自从何时以来”，引导时间从句。
句意：自从我从国外回来，我已经听说了关于你的许多好的事情。
2.【2013重庆25】_______ we have enough evidence, we can't win the case.A. Once B As long as C. Unless D. Since【答案】C【解析】考查状语从句。
Unless引导条件状语从句。
句意：除非我们有足够的证据，否则这个案子我们不能取胜。
3.【2013重庆23】It's not easy to change habits, _______ with awareness and self-control, it is possible.A. forB. orC. butD. so【答案】C【解析】考查并列连词。
句意：改变习惯不易，但如果是有意识和有自我控制能力的话，还是有可能的。
语境表明前后分句为转折关系，用并列连词but连接两分句。
【语言学习】awarenessPublic service advertisements should be put on mass media to raise public awareness of environmental protection. 政府可以投入公益广告，提高公众环保意识。
4.【2013辽宁24】One can always manage to do more things, no matter _______ full one’s schedule is in life.A. howB. whatC. whenD. where【答案】A【解析】考查状语从句。
完整版)高考语法填空状语从句(含答案)
完整版)高考语法填空状语从句(含答案)1.XXX increases。
the number of XXX increases.2.When you purchase a fish and bring it home。
it is advisable to store it in the refrigerator if you do not XXX.3.Despite being in his ies。
XXX.4.Listening to music is a great way for me to relax and takemy mind off daily stresses.5.Regardless of the n。
it is important not to be a bystander.6.Whenever the little panda cried。
its mother would rock it back and forth and give it comforting pats.7.While some people are motivated by the desire for success。
XXX failure.8.Although online shopping has had a significant impact onour lives。
not all of its effects have been positive.18.The word "nice" went through several changes in meaning before it finally included the sense of "pleasant."19.XXX me up in the middle of the night to watch thefootball game.20.The young couple who returned my lost wallet left before I could ask for their names.21.Even after half an hour。
高考英语中的让步状语从句
高考英语中的让步状语从句状语从句是每年高考单项填空部分必考的题目之一，而让步状语从句又是其考查的重点之一。
高考中涉及到的让步状语从句有以下几种类型：一、 whatever， whoever， wherever， whenever， however等引导的让步状语从句。
这类词引导的让步状语从句可以和no matter what/who/where/when/how等引导的让步状语从句换用，意为"无论……，都……"。
解这一类题目时，要注意连词在让步状语从句中所作的句子成分，另外，还要注意从句的语序。
例如：【考例】①The lawyer seldom wears anything other than a suit__________the season.（2008全国卷I）A. whateverB. whereverC. wheneverD. however【解析】A。
whatever 引导让步状语从句，其后省略了it is。
题意是"无论什么季节，律师除了穿套装外，很少穿其他衣服"。
② _____ well prepared you are, you still need a lot of luck in mountain climbing. (2008年上海卷)A. HoweverB. WhateverC. Nomatter D. Although【解析】A。
此题考查however的用法。
However等于no matter how,但no matter不能单独用。
句中的well是副词，所以用however,而不用whatever。
③______ hungry I am, I never seem to be able to finish off this loaf of bread. （2008辽宁卷）A. WhateverB. WheneverC. WhereverD. However【解析】D。
(word完整版)高考英语状语从句40题附答案
高考英语状语从句40题附答案1.—Wha.ar.yo.goin.t.d.thi.summer?—I'm going to visit the Great Wall __________ the school term ends.A.s.tha.B.a.soo.as.C.before.D.i.orde.that2.M.Englis.i.ver.poor..can'.lear.i.wel._________.yo.hel.me.A.if.B.unless.C.while.D.when3..wa.tol._____puters.A.tha.ho..B.ho.tha..C.whe.tha..D.tha.when4.—D.yo.hav.an.problem.i.yo._______.fiv.minute.t.read?—Well.I'.thinkin.abou.th.ne.words.Ther.ar.to.many.A.giv..B.give..C.ar.give..D.wer.given5.His father has worked for 17years in this factory __________ he came here in 2000.A.since.B.for.C.whenD.ho.long6.Thi.lesso.wa.s.borin.___.som.student.bega.t.slee.i.class.A.that .B.and .C.when .D.how7.You can make progress in English __________ you try your best.A.befor.B.unless.C.whether.D.a.lon.as.8._______.h.ha.littl.knowledge.th.ol.worke.ha..lo.o.experience.A.I.B.Becaus..C.Althoug.D.when9.I will lend you my computer you promise to return it on time.A.sinc..B.whe..C.o.conditio.tha..D.i.orde.that10..tru.frien.ca.se.th.pai.i.you.eye.____.everyon.els.believe.th.smil.o.you.face.A.whil..B.becaus..C.befor..D.until11.Th.movi.i..grea.success._________.it'.no.ver.good.A.s..B.bu..C.althoug..D.and12.Jac.was’.sayin.anything,bu.th.teache.smile.a.hi.. h.ha.don.somethin.ver.clever.A.in caseB.as ifC.wileD.though13.I.th.exam.th._______.yo.are.th.______.mistake.yo.wil.make.A.careful.littl..B.mor.careful.fewes..C.mor.careful.fewe..D.mor.careful.less14.Thi.i.a.interestin.book...... I’l.bu.it... .A.ho.muc.ma.i.cos..B.howeve.i.ma.cos.C.ho.ma.i.cos....D.n.matte.ho.i.ma.cos.15.Today we will begin we stopped yesterday so that no point will be left out.A.whenB.whereC.howD.what16.—Does Ted tell you if he __________ next Sunday?—No.h.doesn't.Bu.i.h.________.I'l.giv.yo..ring.e...e..e17.Th.bu.drive.alway.say.t.u.,“Don'.ge.off_______.th.bu.stops.”A.whe...B.whil.....unti...D.i.18.Yo.spea.i..lo.voice.Danny.Pleas.spea.loudl.____..ca.hea.yo.clearly.A.thoug..B.s.tha..C.bu..D.unless19.____ you keep on trying, I really don’t mind whethe.you can come up top in your class.A.As long asB.Even thoughC.As soon asD.The moment20..Yesterda.ther.were ... .man.peopl.i.th.par.... .almos.los.m.way..I.wa.th.Ma.Da.holiday.Lot.o.peopl.wante.t.hav.fu.there.A.quite.that .B.very.tha.C.enough.that .D.so.tha.21..won'.believ.you__..hav.see.i.wit.m.ow.eyes...A.befor..B.unti..C.afte..D.when22.Some people are holding their umbrellas ____ it is raining.A. in caseB.so thatC.as thoughD.unless23.—We'l.g.fo..picni.i.i._______.thi.Sunday.— Wish you a lovely weekend.A.rai..B.rain..C.won'.rai..D.doesn'.rai.24.—You speak _____ fast _____ we can’t follow you.—I will speak slowly.A.so.that .B.such.tha.C.suc.a.tha.D.too.to25.Sh.__.hom.__.sh.wa.satisfie.__.hi.answe.yesterday...A.didn'.go.until.t....B.wasn'.g o.after.t...C.doesn'.go.before.wit..D.didn'.go.until.with26.There are always ____interesting stories in the series that ___ many people watch them.A. so.so .B.such.suc..C.such.so ..D.so.such27.we won’t change our plan, it rains.A.becaus..B.sinc..C.a.i.D.eve.i.28.Yo.shoul.finis.you.lesson.______.yo.g.ou.t.play.A.befor.B.afte.C.whe.D.while29.Projec.Hop.ha.raise.muc.mone._________.th.poo.childre.ca.g.t.school.A.because.B.s.tha..C.i.orde.to.D.though30.Teres.i._______.nervou._______.sh.can'.tal.i.fron.o.th.class.A.such.tha..B.too.t..C.so.tha..D.too,that31.These days the long TV play is popular my mother often keep watching it for twohours without a rest a day .A.such.that .B.to..t..C.ver..that .D.s..that32.Th.meetin.didn'.start__.everyon.wa.there.A.becaus..B.unti..C.wh..D.if33.Stayin.i..hote.cost.... rentin..roo.i.a.apartroo.fo..week.A.twice as more asB.as more twice asC.twice as much asD.as much twice as34.H.too.of.hi.coa.______.h.fel.hot.A.becaus.B.a.C.i.D.since35._________.afte.th.dail.har.work.M.Ya.wa.hungr.fo.books.A.Tire.a.wa.h..B.A.tire.h.wa..C.A.h.wa.tire..D.Tire.a.h.was36.Whe.yo.rea.th.book.you’.bette.mak..mar.______.yo.hav.an.questions.A.whic.B.tha.C.wher.D.though37._________ hamburgers are junk food, __________ many children like them.A.Although...B.Although.bu..C.Because...D.Because.so38.Literature must consist of words, music sonsist of sounds.A.even thoughB.so thatC.just asD.even sincet.fo.clas.yesterda.______.ther.wa.somethin.wron.wit.m.bike.A.whe.B.tha.C.unti.D.because40..Th.docto.tol.m.no.t.ea.to.much.bu..foun.i.difficult.—Th.docto.i.right.________.yo.eat._____.yo.wil.be.A.Th.less.th.healthie...B..Th.less.th.mor.healthilyC.Th.more.th.healthie..D.Th.more.th.mor.healthily1~5BBDCA 6~10ADCCA11~15CBCBB 16~20ACBAD21~25CADAD 26~30CDABC31~35DBCAD 36~40CACDA。
高考状语从句
高考状语从句高考状语从句是在句子中起修饰或限定作用的从句，常常用来表达时间、条件、原因、目的等情况。
在高考英语考试中，掌握状语从句的使用是非常重要的。
下面是一些常见的状语从句类型及其用法：1. 时间状语从句：用于表示主句发生的时间。
例如：I will call you when I arrive home.（当我到家后会给你打电话。
）He had already left before I arrived.（在我到达之前他已经离开了。
）2. 条件状语从句：表示主句的发生条件。
例如：If it rains tomorrow, we will stay at home.（如果明天下雨，我们将呆在家里。
）Unless you study hard, you will fail the exam.（除非你努力学习，否则你会考不及格。
）3. 原因状语从句：表达主句的原因。
例如：Because he was sick, he couldn't attend the meeting.（因为他生病了，所以不能参加会议。
）Since it's raining, we decided to stay indoors.（因为下雨了，我们决定待在室内。
）4. 目的状语从句：表示主句的目的或出发点。
例如：I brought my umbrella so that I wouldn't get wet.（我带了伞，以便不会淋湿。
）He works hard in order that he can achieve his goals.（他努力工作以便能达到自己的目标。
）以上只是状语从句的几个常见用法，考生在备考过程中还需多加练习，加深对状语从句的理解和使用。
(完整版)高考英语专题复习状语从句(附答案)
高考英语专题复习状语从句（附答案）I. 考点分析状语从句可用来表示时间、地点、原因、目的、结果、条件、方式、比较和让步等。
1．时间状语从句1) 常见关联词有when, whenever, while, as, before, after 等。
2）注意not…until… 正常结构、倒装结构、强调结构、和until置于句首的用法。
He didn’t go to sleep until he had finished his homework. （正常结构）Not until he had finished his homework did he go to sleep. （倒装结构）It was not until he had finished his homework that he went to sleep.（强调结构）Until he had finished his homework he didn’t go to sleep. （until置于句首）3）表示“一……就……”的连词：once, as soon as, hardly/scarcely…when, no sooner…than, the minute, the moment, the instant, immediately, directly, instantly4）其他表示时间的短语还有：every time, next time, the day 等。
2．地点状语从句通常由where, wherever引导如：Where there is a will, there is a way.3．原因状语从句1) 通常由because, as ,since引导, 三者区别：because 语气最强，重在交待原因，以why引导的疑问句只能because用来回答；其前可用only, just等词强调；可用在It is…that…强调句型中。
超实用高考英语专题复习：专题 12 -状语从句(含高考真题)
超实用高考英语专题复习：专题12状语从句距离高考还有一段时间，不少有经验的老师都会提醒考生，愈是临近高考，能否咬紧牙关、学会自我调节，态度是否主动积极，安排是否科学合理，能不能保持良好的心态、以饱满的情绪迎接挑战，其效果往往大不一样。
以下是本人从事10多年教学经验总结出的以下学习资料，希望可以帮助大家提高答题的正确率，希望对你有所帮助，有志者事竟成！养成良好的答题习惯，是决定高考英语成败的决定性因素之一。
做题前，要认真阅读题目要求、题干和选项，并对答案内容作出合理预测;答题时，切忌跟着感觉走，最好按照题目序号来做，不会的或存在疑问的，要做好标记，要善于发现，找到题目的题眼所在，规范答题，书写工整;答题完毕时，要认真检查，查漏补缺，纠正错误。
总之，在最后的复习阶段，学生们不要加大练习量。
在这个时候，学生要尽快找到适合自己的答题方式，最重要的是以平常心去面对考试。
英语最后的复习要树立信心，考试的时候遇到难题要想“别人也难”，遇到容易的则要想“细心审题”。
越到最后，考生越要回归基础，单词最好再梳理一遍，这样有利于提高阅读理解的效率。
另附高考复习方法和考前30天冲刺复习方法。
状语从句在句中作状语。
状语从句位于主句之前时,常用逗号隔开;位于主句之后时,一般不用逗号。
状语从句按其意义和作用可分为时间、地点、原因、目的、结果、条件、方式、比较和让步等状语从句。
【课前检测】5minutes1.[2020全国65]__________he asked the villagers on the banks of the river where he could find the legendary(传奇的) artist, they smiled and pointed down the river.2.[2020新高考I(山东),37]They kept their collection at home until it got too big_______until they died, and then it was given to a museum.3.[2018北京,2]________we don't stop climate change,many animals and plants in the world will be gone.4.[2018江苏,29]________you can sleep well, you will lose the ability to focus, plan and stay motivated after one or two nights.5.[2017 江苏,23]Located the Belt meets the Road. Jiangsu will contribute more to the Belt and Road construction.6.[2017 北京,28]If you don't understand something, you may research, study , and talk to other people_______ you figure it out.7.[2016 丙卷(全国),61]In much of Asia, especially the so-called " rice bowl" cultures of China, Japan, Korea,________Vietnam, food is usually eaten with chopsticks.8.[2020全国改错]First I cut the tomatoes into pieces but put them aside.9.[2020全国I改错]I waited patiently unless the oil was hot.10.[2019 全国Ⅱ改错]When I studied chemistry in high school,I reconsidered my goal or decided to be a doctor. 课中讲解高考常考点一．时间状语从句1.when, while, asWhen I lived there, I used to go to the seashore on Sundays.我住在那里时,星期天常到海滨去。
高考英语_状语从句_详解习题加答案
状语从句1. 在主从复合句中修饰主句中的动词，形容词，副词等的从句叫状语从句。
可分为，时间状语从句，地点状语从句，原因，目的，结果，条件，让步，比较和方式状语从句。
2. 时间状语从句起时间状语作用的句子；可放在句首，句中和句尾常用引导词：when，while, as, after, before, since, till, until, the moment, hardly … when , no sooner … thanwhen, while, as的用法1) when 用法最广，常可代替while和as, 在while 引导的从句中，动词只能是延续性的When the fire broke out, all the students were sleeping soundly.The telephone rang while I was taking a bath.2) 当两个表示时间延续的动作同时发生而又有对比意味的时候，用while，在这样的复合句中，主句从句的时态通常是相同的。
Father was preparing a report while I was playing PC games.3) 常用as的情况：一边…一边；表示随着短暂动作的发生，另一行为伴随发生As he talked on, he got more and more excited.They talked as they walked along the river.My cap was blown away as I sat down.until和till的用法表示“一直到…”时，主句和从句都用肯定式；I will wait until/ till the concert is over.表示“直到…才…”是，主句用否定，从句用肯定式。
They can’t go until Sunday.since的用法He has written to me frequently since he was ill. 自从他病好以来，他常写信给我。
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历届高考试题中的状语从句1. — How long has this bookshop been in business?— ____________ 1982. ( 94 )A. AfterB. InC. FromD. Since2. Mother was worried because little Alice was ill, especially ____ Father was away in France.A. asB. thatC. duringD. if3. If we work with a strong will, we can overcome any difficulty, ____________ great it is. ( 95 )A. whatB. howC. howeverD. whatever4. After the war, a new school building was put up _______ there had once been a theatre.A. thatB. whereC. whichD. when5. — I am going to the post office.— you’re there, can you get me some stamps? ( 99 )A. AsB. WhileC. BecauseD. If6. You should make it a rule to leave things _____________ you can find them again. ( 99 )A. whenB. whereC. thenD. there7. ____________ you’ve got the chance, you might as well make full use of it. ( 99 )A. Now thatB. AfterC. AlthoughD. As soon as8. We’ll have to finish the job, _____________. ( 99 )A. long it takes howeverB. it takes however longC. long however it takesD. however long it takes9. Someone called me up in the middle of the night, but they hung up____________ I could answer the phone. ( 00 )A. asB. sinceC. untilD. before10. The WTO cannot live up to its name _____________ it does not include a country that is home to one fifth of mankind. ( 00 )A. as long asB. whileC. ifD. even though11. The men will have to wait all day ____________ the doctor works faster. ( 01春季 )A. ifB. unlessC. whetherD. that12. — Did you remember to give Mary the money you owed her?— Yes, I gave it to her ____________ I saw her. ( 01春季 )A. whileB. the momentC. suddenlyD. once13. Americans eat ________ vegetables per person today as they did in 1910. (02上海春季 )A. more than twiceB. as twice as manyC. twice as many asD. more than twice as many14. — How far apart do they live?— _____________ I know, they live in the same neighbourhood. ( 03上海 )A. As long asB. As well asC. As far asD. As often as15. A good storyteller must be able to hold his listeners’ curiosity _______ he reaches the end of the story. ( 03上海 )A. whenB. unlessC. afterD. until16. Generally speaking, _____ according to the directions, the drug has no side effect. ( 03上海 )A. when takingB. when takenC. when to takeD. when to be taken17. — Dad, I’ve finished my assignment.— Good, and ____________ you play or watch TV, you mustn’t disturb me. ( 03上海 )A. wheneverB. whetherC. whateverD. no matter18. — Was his father very strict with him when he was at school?— Yes. He has never praised him _______ he became one of the top students in his grade.A. afterB. unlessC. untilD. when19. He made a mistake, but then he corrected the situation ______ it got worse. (03 北京 )A. untilB. whenC. beforeD. as20. _______ I know the money is safe, I shall not worry about it. (03 北京 )A. Even thoughB. UnlessC. WhileD. As long as21. Scientists say it may be five or six years _________ it is possible to test this medicine on human patients. ( 04 福建 )A. sinceB. afterC. beforeD. when22. You should try to get a good night’s sleep _______ much work you have to do . ( 04 湖北 )A. howeverB. no matterC. althoughD. whatever23. It was evening ________ we reached the little town of Winchester .A. thatB. untilC. sinceD. before24. _____ modeling business is by no means easy to get into, the good model will always be in demand. ( 04 浙江 )A. WhileB. SinceC. AsD. If25. We were swimming in the lake _______ suddenly the storm started. ( 04北京春季 )A. whenB. whileC. untilD. before26. ____ I can see, there is only one possible way to keep away from the danger. ( 04 北京春季 )A. As long asB. As far asC. Just asD. Even if27. We were told that we should follow the main road ____we reached the central railway station .A. wheneverB. untilC. whileD. wherever28. _____ you call me to say you' re not coming, I'll see you at the theatre. (04 四川 )A. ThoughB. WhetherC. UntilD. Unless29. You can eat food free in my restaurant ________ you like. ( 04 重庆 )A. wheneverB. whereverC. whateverD. however30. _____________ I accept that he is not perfect, I do actually like the person. ( 04 江苏 )A. WhileB. SinceC. BeforeD. Unless31. Several weeks had gone by ______I realized the painting, was missing. (04 )A. asB. beforeC. sinceD. when32. Jasmine was holidaying with her family in a wildlife park _____ she was bitten on the leg by al lion. ( 04 上海 )A. whenB. whileC. sinceD. once33. ________, I have to put it away and focus my attention on study this week. ( 04上海春季 )A. However the story is amusing B No matter amusing the story isC. However amusing the story isD. No matter how the story is amusing34. It is almost five years we saw each other last time.A. beforeB. sinceC. afterD. when35. What a table ! I’ve never seen such a thing before .It is it is long. ( 05湖北 )A. half not as wide asB. wide not as half asC. not half as wide asD. as wide as not half36. Simon thought his computer was broken his little brother pointed out that he had forgotten to turn it on. ( 05 北京春季 )A. untilB. unlessC. afterD. because37. I’d like to arrive 20 minutes early _______ I can have time for a cup of tea. ( 05 北京 )A. as soon asB. as a resultC. in caseD. so that38. It wasn’t until nearly a month later I received the manager’s reply. ( 05河南、河北 )A. sinceB. whenC. asD. that39. Unlike watching TV, reading is a highly active process (过程)________ it requires attention as well as memory and imagination. （ 05 江苏）A. untilB. butC. unlessD. for40. The old tower must be saved, _______ the cost. ( 05 浙江 )A. howeverB. whateverC. whicheverD. wherever41. You must keep on working in the evening ______ you are sure you can finish the task in time.A. asB. ifC. whenD. unless42. That was really a splendid evening. It' s years _______ I enjoyed myself so much. ( 05 安徽 )A. whenB. thatC. beforeD. since43. John is the tallest boy in the class, ___________ according to himself. (05 安徽 )A. five foot eight as tall asB. as tall as five foot eightC. as five foot eight tall asD. as tall five foot eight as44. —Did Jack come back early last night?—Yes. It was not yet eight o’clock he arrived home. ( 05 福建 )A. beforeB. whenC. thatD. until45. Allow children the space to voice their opinions, ___ they are different from your own.A. untilB. even ifC. unlessD. as though46. The more I think about him, the more reasons I find for loving him ___ I did. ( 05 湖南 )A. as much asB. as long asC. as soon asD. as far as47. you’ve tried it. you can’t imagine how pleasant it is. （06北京）A. UnlessB. BecauseC. AlthoughD. When48. --- How long do you think it will be _________ China sends a manned spaceship to the moon?--- Perhaps two or three years. （06福建）A. whenB. untilC. thatD. before49. Jenny was very sad over the loss of the photos she had shot at Canada, this was a memory she especially treasured. （06广东）A. asB. ifC. whenD. where50. "You can't have this football back you promise not to kick it at my cat again," the old man said firmly. （06广东）A. becauseB. sinceC. whenD. until51. I had just stepped out of the bathroom and was busily drying myself witha towel ____ I heard the steps. （ 06湖南）A. whileB. whenC. sinceD. after52. _________ environmental damage is done, it takes many years for the ecosystem (生态系统) to recover. （ 06江苏）A. Even ifB. If onlyC. WhileD. Once53. He was about halfway through his meal a familiar voice came to his ears. （ 06辽宁）A. whyB. whereC. whenD. while54. he has limited technical knowledge, the old worker has a lot of experience.A. SinceB. UnlessC. AsD. Although55. We’re just trying to teach a point ____ both sides will sit down together and talk. （ 06 山东）A. whereB. thatC. whenD. which56. How can you expect to learn anything ____ you never listen? （ 06山东）A. in caseB. even ifC. unlessD. when57. His plan was such a good one _________we all agreed to accept it. （ 06陕西）A. soB. andC. thatD. as58. This is a very interesting book. I’ll buy it, __________. （ 06 陕西）A. how much may it costB. no matter how it may costC. however much it may costD. how may it cost59. My parents were quarrelling about me ____ I could not quite tell why. （06上海）A. sinceB. thoughC. ifD. until60. --- Mom, what did your doctor say?--- He advised me to live the air is fresher. （ 06四川）A. in whereB. in whichC. the place whereD. where61. --- Why didn’t you tell him about the meeting?--- He rushed out of the room I could say a word. （ 06四川）A. beforeB. untilC. whenD. after62. The cost of living in Glasgow is among the lowest in Britain, the quality of life is probably one of the highest. （ 06天津）A. sinceB. whenC. asD. while63. If you are traveling the customs are really foreign to your own, please do as the Romans do. （ 06天津）A. in whichB. whatC. whenD. where64. In time of serious accidents，_________ we know some basic things about first aid, we can save lives. （ 06重庆）A. whetherB. untilC. ifD. unless65. __ most of the earth’s surface is covered by water, fresh water is very rare and precious.A. AsB. OnceC. IfD. Although1 ---5 DACBB 6 ---10 BADDC 11 ---15 BBDCD 16 --- 20 BBCCD 21 ---25 CADDA26 -- 30 BBDAA 31 -- 35 BACBC 36 -- 40 ADDDB 41 ---45 DDBBB 46 -- 50 AADAD51 - 55 BDCDA 56 -- 60 DCCBD 61 --65 ADDCD。