Unit 10 I've had this bike for three years.-【支点·同步系列】2024-2025学年八年级下册英语（人教版）

Unit 10 I've had this bike for three years. 第1课时 Section A(1a-2d) 基础达标训练 3.那些照片能唤起许多美好的回忆 The photos can many 一、用方框中所给词的适当形式填空 good cent soft bear sweet board 能力拓展提升 1. These toy must belong to John's sister. She likes soft toys. 补全对话 A: Hi, Bill. What a nice watch! How 2. At the beginning of the first class, the long teacher wrote her name on the have you had it? 3. The lovely rabbits on these stamps remind B: 1 I like it very much. me of my childhood. A: Who bought it for you? 4. I passed by a yard sale and bought the B: Oh,my father bought it for me. 2 What second-hand book with 50 birthday gifts have you ever received? 5. Lisa touched her pet cat as soon A: Some basketballs. as she came back home. B:3 二、用所给词的适当形式填空 A: Yes,I do, I have been a member of our school 1. This camera is on (sell) for only basketball club for more than six years. 1,ooo yuan now. B:Really?4 2. I have (check) your answers A:I began to play basketball when I was seven and only two of them are right 3. Mrs. Brown bought some new years old. B:5 (toy) for her son 4. What nice (scarf)! I don't know A: I have given away twenty basketballs to which one to choose. others in need, so I only have three now. 5. If your new computer doesn't work, send it B: You are great! _(make). back to the A. It is my birthday gift. 三、根据汉语意思完成句子 B. Do you often play basketball? 1.请让他们为我核实一下信息。 C. I've had it for less than ten days Please ask them to the D. When did you begin to play basketball? information for me. E. Why did you give away so many basketballs? 2. 上周末我家举行了庭院拍卖会。 F. How many basketballs have you had so far? My family last weekend 1-5 下册Unit 10 第2课时 Section A(3a-4c) 基础达标训练 4.说实在的,我们很喜欢刘老师的课 ,we like Mr. Liu's 一、用方框中所给词的适当形式填空 classes very much. railway own certain bedroom junior 5.至于我,我不再用这些旧东西。 1. For a reason. I won't be in the me,I use meeting tomorrow afternoon. these old things. 2. The train to Beijing is coming. Please go to the 能力拓展提升 station to meet Linda quickly 3. Lucy's and Lily's are 单项填空 1. Before we hand in our test papers, we upstairs. They are tidy and clean. should them carefully to make sure 4. The boy is 14 years old and he is a high school student there are no mistakes. A. check B. avoid C. watch D. practice 5. The rich farmer a big farm and a 2. Let's the old toys and clothes.We large house. 二、用所给词的适当形式填空 don't need them now. A. clear out (die) for B. feel free 1. His grandma has been C. take in eight years. D. check out (clear)my 3. -The photo looks very old. 2. I need some fresh air -Yeah, my grandpa took it in 1969. It head. always brings back happy of his 3. You and I must be (truth) with each other. friends and him in the countryside. A. memories B.messages 4. We haven't (see) each other since I C. reports D. chores came to Nanchang. 4.(2024鹰潭月湖区期末)-Whata fantastic 5. Mr. Li treats his students in an camera you've got! When _you buy (understand) way. it,Lily? 三、根据汉语意思完成句子 it for two years. I used it to 1.电影已经开始有一会儿了。 record the changes of my hometown. The movie has been on A. did: bought B. did:have bought 2.这个女孩如此爱她的宠物狗,以至于她不想 C. do;had D. did:have had 与它分开。 5. Mr. Huang was born in Nanjing,but Suqian The girl loved her pet dog so much that she i. didn't want to has become his second A. family B. house 3.你要怎样处理你筹集的钱呢? C.village D. hometown What would you the money you raise? 1-5 英语八年级BJ版 阶段素养提升1 一、完形填空 素养:思维品质 主题:生活与学习 难度:中 建议用时:9分钟 Love,joy and the warm feeling of getting 3 all:lots of 14 . That was over 60 years ago together don't cost a thing. But gifts do cost and I still think about those 15 memories. money. So what does a poor family do? I will never forget all the joy my parents Before New Year, I told my mother that brought into my life. the only thing I 1 was a pogo stick(弹策 1. A. owned B. wanted C. forgot D. found 单高跷). However,my mother said they were 2. A. make B. borrow C. accept D. afford so expensive that we couldn't 2 one. 3. A. picking out B. looking out On a Saturday before New Year,my C. going out D. staving out family went shopping together. While my 4. A. when B. if C. where D. though 5. A. quietly mother and I were 3 the gifts, my dad B. perfectly took out a long box. I wondered 4 there C. suddenly D. certainly was a pogo stick in it. 6. A. surprised B. interested When we arrived home, my dad put the C. excited D. relaxed box in the garage(车库). While my parents 7. A. success B. promise C. advice D. luck were busy with their chores,I 5 walked 8. A.magic B. silly C. different out to the garage and found the box. I was so D. smart 6 and I knew as soon as I opened that 9. A.but C. and B.so D.or 10. A. preparing magical box,my bright shiny pogo stick woule B. hiding appear. No such 7 ! Inside the box was a C.choosing D. carrying 8oldbroom(扫昂). 11. A. understand B. decide That New Year morning, I got some nice C. believe D. explain gifts 9 I didn't get the present that I really 12.A.me B.us C. him D. her wanted. 13. A. progress B. time C. money After cleaning up the room,my dad went D. trouble 14. A. trust B. love C. smiles to the garage. When he came back,he was D. pride 10 a beautiful pogo stick. I couldn't 15.A.bad B. honest 11 it! My parents probably got quite a C. educational D. wonderful laugh from the trick they played on 12. 1-5 6-10 Although we didn't have much 13 . 11-15 my parents gave me the most important gift of 二、短文填空 素养:思维品质 主题:生活与学习 难度:易 建议用时:7分钟 table own among part honest when One day I went to a yard sale with my but regard price happy cheap brother. We could always find something good 下册 Unit 10 the things there. For example, some other things. Before I paid for them, the 9 interesting tovs or great novels at a low also checked the cup and found no price tag. 2, which could excite us. Then she said,"Fifty cents.”I bought To be 3 , we were just students and it10. the things there were usually 4. So we 11 I got home and tried to wash it.I 5 it as a good way to buy things with less found there was some coffee inside the cup! I money. We picked several things at first. And bought someone's real coffee cup! later I found a beautiful coffee cup with a nice 3. lid(盖子) on one of the 6 .I looked at it 4 6 for a while, 7 I found it didn't have a price 7. tag. Would it be an expensive one? I was not 10. sure,but it was so nice that I didn't want to 8 with it. So I carried it together with 三、阅读理解 素养:思维品质 主题:生活与学习 难度:中 建议用时:8分钟 A primary school in the southwest of kissed the land will not have a complete China has become popular recently. In this childhood. The labor (劳 动)class helps school students and teachers can have free students build excellent characters and better meals. There are more than 1, ooo students understand life and nature." and teachers in this school. With enough 1. What does the primary school provide for farmland, students and teachers plant the students? A. Free computers. vegetables and keep pigs, sheep and chickens. B. Free clothes. C. Free meals Some of them are sold at the market. The rest D. Free bikes. will be used to feed students and teachers. And 2. How often do the students do farm work? this school has fed itself for 15 years. A. Once a week Each class has a piece of land to plant B. Twice a week. vegetables or keep animals. Students do farm C. Three times a week. work twice a week with the help of teachers. D. Four times a week There is also a zoo in the school. It helps 3. What's the purpose of setting up a greenhouse? students get on with animals. The school has set up a greenhouse(温室) with fruit trees for A. To help students learn about nature. students to learn about nature, instead of just B. To take the place of all the teachers. C. To provide students with enough food. listening to teachers in the classroom “This is not simply a farm. This is D. To help students to get on with animals connected with what the whole school can eat 4. What's the best title for the text? A. Plant vegetables B. Keep animals and also the quality of life of students anc C. Build a zoo D. Kiss the land teachers," said the school's headmaster He also said, "Children who bave not 1-4 英语/八年级BJ版 单元 语法讲练 单元语法讲解 5. Tony has played computer games two hours. 现在完成时(三) 二、用所给词的适当形式完成短文 表示从过去持续到现在的动作或状态,可以 The film My People,My Homeland came 和从过去某一时刻延续到现在的时间状语连用 out on October 1st, 2o20. I think I 1 如for十时间段,since十过去时间点,since十过去 (never see) such a fantastic film before. I 时的从句,since十一段时间十ago等。for与since 2 (watch) it at least three times since it 引导的时间状语有些可以相互转换 came out. Have you ever 3 (see) this film? 1.句中动词的特点 If not, I'd like to introduce it to you. 此种用法中表示持续性的动作或状态的 The film tells five different stories and I 动词必须是延续性动词(否定句除外) like The Last Lesson best. An old teacher has 2.非延续性动词与延续性动词之间的 been ill for years and he 4 (want) to come 转换 back to China to finish his last lesson. It was (1)转化为相应的延续性动词,用于现在 完成时态。 so touching that I couldn't help crving. Since buy→have then,my dream 5 (be) to be a teacher like borrow→keep him. I hope I can make it come true one day. catch a cold→have a cold put on→wear Another story 6 (make) me laugh a (2)转化为“be十形容词/副词/介词短语/ 名词”。 lot. The actor is really funny, In the film, he 7 (work) as the head of a village, but his begin/start→be on close→be closed die→be dead open→be open wife thought he 8 (learn) to draw in finish→be over fall ill→be ill Russia at that time. One day, his wife wanted to make a video call to him, so all the villagers get up→be up fall asleep→be asleep 9 (try) their best to pretend(假装) to be join→be in/be a member of in Russia. A lot of funny stories happened. At 单元语法精练 last, his wife 10 (know) the truth and 一、用for或since填空 supported(支持) him. 1. Jack's grandfather has been ill two Whether the stories are funny or weeks. 2 touching,everyone in the film works hard for 2012, Dad has worked in this their hometown. I will learn from them and dc company. something for my hometown. 3.-How long has your sister taught in this 3 college? , , s four years ago. A. he was five 4. Fred has known Betty 8. 10. years old. 下册Unit 10 第3课时 Section B(1a-1d) Fifthly, we should encourage others to keep ...... 基础达标训练 the environment clean. We can do this by setting a 用所给词的适当形式填空 1. We should brush our teeth at good example ourselves and teaching others abou (little) twice a day. the importance of a clean environment Lastly, we should practice the 3Rs- 2.The (make)recalls(召回)a lot reduce, reuse, and recycle. By reducing our of cars that are unsafe. 3. There's something wrong with my eyes. I waste, reusing items, and recycling materials (clear). can't see things we can help protect our environment. 4. I'm using the bicycle now but my sister is All in all, a clean living environment is (own). the real necessary for our health and well-being. We must all work together to keep 5.I (certain) don't mind your our sitting beside me. surroundings clean and beautiful. Let's do ou part to create a healthy and happy living 能力拓展提升 environment for ourselves and future 阅读理解 素养:思维品质 主题:环境保护 generations(后代). 难度:中 建议用时:8分钟 1. What should we do with our waste? 原创题 A clean living environment is A. Throw it on the ground. important for our health and happiness. We B. Burn it. must take care of our surroundings to keep C. Use dustbins. them clean and beautiful. D. Leave it in the toilet. Firstly, we should not litter. We must use 2. What does the underlined word "harms" dustbins to throw our waste. This will keep mean in the third paragraph? our streets and parks clean and pleasant. A. Protects. B. Pollutes. Secondly, we should not pollute our C. Feeds. D. Endangers. water. We should not throw plastic and other 3. Why should we plant more trees and flowers? waste into rivers and lakes. This harms the A. Because they provide shade fish and other animals living in the water. B. Because they improve air quality. Thirdly, we should plant more trees and C. Because they attract birds flowers. They make our environment beautiful D. Because they are pretty. and give us fresh air to breathe. Trees also 4. What are the 3Rs? help to prevent floods and soil erosion(侵蚀). A. Reduce, reuse and recycle Fourthly, we should use environmentally B. Read,write and relax friendly products(产品). For example,we can C. Run,jump and play. use reusable bags and water bottles instead of D. Rice, noodles and soup. plastic ones. We can also use solar energy to reduce pollution 1-4 英语八年级BJ版 第4课时 Section B(2a-2d) 基础达标训练 3. Ask the children not to stand the pool. 一、根据句意及首字母提示完成句子 1. The girl is drawing some grass and trees 4. My dad doesn't like music with a green c_. every band is too loud 2. Although he is two years old,he can c___ 5. Jack is working hard enter a from 1 to 100. good college. 3. There are many students here. A 能力拓展提升 ........ them, the boy with yellow hair is from 单项填空 America. 1. It isa(n) 4. I had a happy c___ for a young man like you in the small village. not to study hard. A. feeling B. shame 5. It'sas that you didn't pass such an C.deal D. opinion easy test. 二、用所给词的适当形式填空 2. (2024连云港)UNICEF helps build a better world for everyone. 1. It is said that the old bridge has been here children all over (century). for the world. A. probably 2. Linda's parents _(hold) a big party B. luckily C. especially for her birthday last Sunday. D. closely 3. For the coming summer vacation, Linda 3.-How do you like Treasure Island? considers (visit) book I -It is. some since interesting places. Grade Two. 4. The police spent two hours A. the most interested: have read (search) for the missing boy in the forest. B. a more interested; read 5. Tim (regard) Mr. Black as a C. the most interesting;have read friend more than a teacher D. a more interesting: read 三、用方框中所给短语的适当形式填空 4.-Excuse me, could you tell me how to get according to in one's opinion to the post office? search for in order to close to -Look out of the window of the shop, Can 1. She is some information you see it? It is just the shop. about Beijing 2o22 Winter Olympic Games A. opposite B. above on the Internet. C. below D. along 2. the rules, people can't take 1-4 photos or smoke in the museum. 下册Unit 10 第5课时 Section B(3a-Self Check) 基础达标训练 One night,I was told by my dad that we 根据句意及汉语提示完成句子 would move to a new town in three weeks (柔软的). 1. -Wow! This dress feels Hearing this, I was unhappy because this small town held all my good I. -Actually,it will be even better if you have it on. I like drawing 2 of all. And my drawing 2. Eric is thirteen years old. He is a student in skills are great. That's because I have kept painting (初级的) high school. at the zoo in my free time 3 I was seven. The 3. The app of learning about China gets popular zoo was 4 to my home. So every Sunday I wen (在其中)the foreigners there on foot to practice painting 4. The old movie reminds me of my 5 all the places in town, the zoo was (童年). 5. -What do you want to do this weekend? my favorite. But there would be no weekly zoc (仔细考虑)going fishing -I trips. I felt sad and took down all my pictures with my uncle. Then I put 6 up on the wall in my new 能力拓展提升 room. I missed the zoo and my animal friends 一、单项填空 When my parents saw this, they took me out 1.(2024景德镇浮梁期末)TheGreens have to 7 for animals in our neighborhood. I here for three years. was 8 to find a bird resting in a tree and a C. lived B. got A. came D. left cat sleeping on a chair. Although we kept them 2.-Let's climb the tree to pick apples. in our home before, I have never noticed these -I don't think that branch(树枝)will beautiful things. our weight. Three years passed and I'm glad that I A. accept B. hold C. prepare D. expect have already 9 my neighborhood as my 3.(2024鹰潭月湖区期末)Mybest friend boy. You can believe James is a(n) zoo. I keep all the paintings in good condition. him. 10 those I painted in that small town. A. unusual B. wild From the experience I learned when we C. unbelievable D. truthful cannot 11 our living environment, it is 1-3 better for us to get used to it. 二、短文填空 素养:思维品质 主题:生活与 2 3 学习 难度:中 建议用时:7分钟 memory since best close especially 7 8. change search regard them among 10. 11 surprise 英语/八年级B版 单元 主题写作 话题分析 #思路点拨 本单元的话题是“居住环境”,可对你所居 本文是一篇介绍自己家乡的记叙文,时态 住的城市或家乡的特色律筑、周围环境及其变 可用一般现在时、一般过去时和现在完成时。 化进行描写,还可描述某环境下你自已或他人 写作时可按以下思路: 拥有的一件喜欢的物品及其影响 1.开门见山交代家乡的地理位置。 #实用句型 2.写家乡的变化、特色建筑等。 1. My hometown has changed a lot in 3.写自己对家乡的真挚情感。 #写作样模板 recent years. 2. It used to be a/an.. place. My hometown is . It is 3. Now things have changed a lot 家乡环境 {-7 famous for... 4. I hope my hometown. the past ... has 例题展示 家乡的变化一> changed a lot ...better than 请根据以下提示,以“Myhometown”为题 before. 写一篇短文。 要点: I believe my hometown 抒发感情一 1.我的家乡是一个历史悠久的小镇,离市 will get better and better. 中心大约一小时车程 #范文欣赏 2.过去人们过着贫困的生活,但近几年发 My hometown 生了很大的变化,大多数人已经搬进了 My hometown is a small town with a long 新公寓,道路也宽敞了; history. It's about an hour's drive from the 3.政府正采取措施改善我们的生活 center of the city. Spring is the best season for 要求: 1.短文需包含所有要点,可适当发挥 camping. Several rivers go through the town. It is famous for many different kinds of fishes. 2.词数80~120 People had a poor life in the past. But it My hometown has changed a lot in the past few years. Most people have moved into the new flats. The roads are wider than before. The government is doing something to improve our life. The environment is better than before. I believe my hometown will get better and better. 下册Unit 10 阶段素养提升2 一、完形填空 素养:思维品质 主题:生活与学习 难度:中 建议用时:9分钟 This is Red Star Town. My grandfather 3. A. pull down has 1 here all his life. He 2 my B.put up grandmother here and they got married. Red C. to pull down Star Town was called Taping Town before. D. to put up B. For The government started 3 the wooden 4.A.At C. Since D.On houses in this area when the Red Star Town 5. A. to miss B. misses C.miss underground station was built. 4 2oo0, D. missing Taping Town has become a history. 6. A. Someone B. Nobody My grandfather 5 many things about C. Somebody D. Everyone 7. A. doctor Taping Town. 6 in the small town knew B. pilot C. teacher him well. They all liked him because he used D. actor 8.A.a lot to be a good 7 in a hospital. Now he is old B.much C.lots of and stays at home. In the past, there were D. lot of 8 stone and wooden houses around here. 9. A.Also B.Too 9 , there were many big trees. Now new C.Either D. Instead 10 are here and there. The 11 are 10. A. house B. buildings C.park wide and clean. There are all kinds of shops D. hotel and you can buy anything 12 . 11. A. houses B. rivers My grandfather is happy that life has C. streets D. shops 12. A. easily improved so much, 13 he still feels lonely B. slowly C. hard because he really misses everything in the D. early 13.A.or B. but C.as past. Many of his friends 14 because the D.so 14. A. moved away government let them live in new apartments in B. took away C. put away new towns. The old town is still beautiful in D. kept away 15.A.if his heart 15 it has disappeared(消失) B. then C. though 1. A. played B. stood D. when C. lived D. liked 1-5 6-10 2. A. went B. met C. gave 11-15 D. took 二、补全短文 素养:思维品质 主题:社会服务与人际沟通 难度:中 建议用时:8分钟 What do people do with their old, out-of- Iaway in homes. More are simply thrown out date but still useful computers? Have you sold with the rubbish. them? I Many old computers are put 2 Sony has agreed to help recycle old 英语/八年级BJ版考点训练2 能力拓展提升 3-4 BD 5.tried her best to 1-4 CDBA 6.eating more 第4课时Section B(2a-2d) 考点训练3 基础达标训练 7.whether 8.if 9.whether to 一、1.crayon2.count3.Among4.childhood 熟词生义 5.shame 10.collecting 11.springs 12.invent .1.centuries 2.held 3.visiting 4.searching Unit 10 5.regards/regarded 三，1.searching for2.According to3.close to 第1课时Section A(1ar2d) 4.In his opinion 5.in order to 基础达标训练 能力拓展提升 -,1.bears 2 board 3.sweet 4.cents 5.softly 1-4 BCCA 二，1.sale2.checked3.toys4.scarfs/scarves 第5课时 Section B(3a-Self Check) 5.maker 基础达标训练 三、1.check out2 had a yard sale 1.soft 2.jounior 3.among 4.childhood 3.bring back;memories 5.consider 能力拓展提升 能力拓展提升 1-5 CABDF 一、1-3CBD 第2课时 Section a(3a-4c】 二，1.memories2.best3.since4.close 基础达标训练 5.Among 6.them 7.search 8.surprised -,1.certain 2.railway 3.bedrooms 4.junior 9.regarded 10.especially 11.change 5.owns/owned 阶段素养提升2 二、1.dead2.to clear3.truthful4.secn -,1-5 CBCCB 6-10 DACAB 11-15 CABAC 5.understanding 二，1-5 BFGDE 三、1.for a while2.part with3.do with 4.To be honest 5.As for:no longer It was fine yesterday.Sanyi Community had a 能力拓展提升 yard sale.More than 200 people took part in the 1-5 AAADD activity.Some people sold used things such as bikes, 阶段素养提升1 toys and clothes.Some sold cards made by -,1-5 BDABA 6-10 CDBAD 11-15 CACBD themselves.Others exchanged used books.I went 二、1.among2.price3.honest4.cheap there at 3:00 p.m.I bought a used bike at a very 5.regarded 6.tables 7.but 8.part 9.owner good price.Everyone was pleased with what they 10.happily 11.When bought and had a lot of fun. 三，1-4CBAD In my opinion,it was a very good activity.We 单元语法讲练 can not only make good use of used things,but also 单元语法精练 protect our environment in this way. -,1.for 2.Since 3.Since 4.since 5.for 高频考点集训 二、1.have never seen 2.have watched 考点训练1 3.seen 4.wanted 5.has been 6.made/makes 1.among 2.between 7.worked 8.was learning 9.tried 10.knew 考点训练2 第3课时Section B(1a1d) 3.B 基础达标训练 考点训练3 1.least 2.maker 3.clearly 4.owner 5.certainly 4.B 5.considers us as 244 英语八年级RJ版 考点训练4 5.mess 6.neither 7.things 8.him 6-7BC 9.offer 10.stress 11.to develop 考点训练5 二、1-5 BACAD 8-9AC 三、1-5 AFBEG 熟词生义 Week Seven 10.bear 11.hold 一、1-5 CCDCB6-10 BDACA11-15 DBDBA Week One 二，1.stand2.quietly3.wonder4.points -,1-5 ACBCD 6-10 ACDBA 11-15 DBACB 5.true 6.But 7.understanding 8.to read 二，1.casily2.coughed3.risk4.trouble 9.know 10.useful 11.advice 5.Although 6.impossible 7.to get 8.climber 三、1-5 GFBDA 9.death 10.importance 11.spirit Week Eight 三，1-5 DGFEA -,1.young 2.become 3.But 4.often 5.with Week Two 6.anymore 7.to do 8.angry 9.disagree -,1.when 2.hurts 3.surprise 4.importance 10.finally 11.several 5.decision 6.herself 7.sick 8.headache 二、1-3BBA 9.situation 10.trouble 11.should 三，1-5 GBCEF 二、1-4CBBA Week Nine 三，1-5 CBAEG -,1-5 DABAB 6-10 CCDBA 11-15 CACDB Week Three .1.hardly 2.different 3.umbrella 4.heavily -,1-5 CDABC 6-10 DABCB 11-15 DADAB 5.when 6.wet 7.to take 8.realized ,1.from 2.volunteered 3.difficulty 4.to help 9.accidents 10.for 11.warmed 5.several 6.strong 7.disabled 8.than 三、1-5 DBFCA 9.raising 10.experiences 11.difference Week Ten 三、1-5 FAGBE 一、1.to find2.first3.before4.groups Week Four 5.different 6.with 7.excitedly 8.angry -,1.volunteers 2.experience 3.homeless 4.but 9.report 10.happened 11.important 5.met 6.lost 7.strong 8.story 9.to do 二、1-4CDDA 10.like 11.also 三、1-5 CAEDB 【思维拓展】C Week Eleven 二、1-3BCC 三、1-5 BFEGA 一、1-5 ADDBC6-10 ABCCC11-15 ADBAC 二、1.sad2.as3.gifts4.to get5.matter Week Five 6.lost 7.while 8.mine 9.happy 10.Finally -.1-5 DABDA 6-10 CBDAD 11-15 BBCAC 11.because 【思维拓展】C 三、1-5 GABEF 二、1.studying2.their3.relax4.children Week Twelve 5.As 6.Secondly 7.tired 8.if 9.interesting 10.to sce 11.great 一、1-5 CBCDA6-10 DCBBA11-15 DBCDC 三.1-5 BDACG 二、1.If2.into3.activity4.to drop5.lying 6.its 7.eyes 8.beautiful 9.touched Week Six 10.suddenly 11.sky -,1.folding 2.fairness 3.waste 4.depends 三，1-5 DCBEA 下册参考答案 245