08 Unit 1 Week two Monday 单元话题专项训练二-【创新教程·博朗英语听力】2026-2027学年高中英语选择性必修第二册同步听力训练（人教版）

博朗英语听力川 UNIT 1 SCIENCE AND SCIENTISTS Week Two Monday 单元话题专项训练二 听力，给顺利答卷开个好头 第一节（共5小题；每小题1.5分，满分7.5分） 听下面5段对话。每段对话后有一个小题，从题中所给的A、B、C 三个选项中选出最佳选项。听完每段对话后，你都有10秒钟的时间 来回答有关小题和阅读下一小题，每段对话读两遍。 1.What does the man mainly do in his spare time? 器扫碑听听打 A.He does some sports. 话题词汇·听前清障 B.He plays the piano. ☐concern about C.He watches videos. 关心 2.What will the speakers probably do next? future career A.Take a class.B.Read a report. C.Choose a subject. 未来的事业 3.Why does the woman talk to the man? put forward A.To discuss a project. B.To send an invitation 提出 C.To ask for information. scientific spirit 4.What type of book is the woman reading? 科学精神 A.Science space.B.Horror fiction. C.Romantic fiction. ☐fair n. 5.What was the man's major in the past? (尤指某类商品 A.Business. B.Management. C.Science. 的)展销会，交 第二节（共15小题；每小题1.5分，满分22.5分） 易会 听下面5段对话或独白。每段对话或独白后有几个小题，从题中 horror fiction 所给的A、B、C三个选项中选出最佳选项。听每段对话或独白前，你 将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟 恐怖小说 的作答时间。每段对话或独白读两遍。 studying business 听第6段材料，回答第6、7题。 学习商业 6.What does the man think of the girl's question? related adj. A.It isn't important. 相关的；有关的 B.It's difficult to answer. professional ath- C.It is easy to understand. lete 7.What does the man say about the ocean and the sky? 职业运动员 A.They are related. B.They look exactly the same. academic adj. C.They have nothing to do with each other. 大学的；学术的 听第7段材料，回答第8至10题。 civil engineer 8.What type of courses is Thomas taking? 土木工程师 A.Sports management. electronic devices B.Sports science. 电子设备 C.Athletic training. 16· UNIT 1 SCIENCE AND SCIENTISTS 9.Why did Thomas change his goal? 边听边记[答题栏] A.He lost a competition. 1 B.His parents forced him to do so. 2 C.His classmates didn't support him. 10.What does the woman think of Thomas'experience in Kenya? 3 A.Exciting. B.Encouraging. C.Discouraging. 4 2- 听第8段材料，回答第11至13题。 5 11.In which country did the man attend university? A.Canada. B.Australia. C.America. 12.Where does the man's mother probably work? > A.At an engineering firm. B.In a hospital. 8. C.At a university. 9 13.What is the probable relationship between the speakers? 10 A.Interviewer and interviewee. B.Co-workers. 11 C.Schoolmates. 12 听第9段材料，回答第14至17题。 14.Who is the woman probably? 13 A.A host. B.A researcher. C.A fisherman. 14 15.What percentage of the fish populations have decreased? A.30%. B.50%. C.90%. .15.. 16.What did the scientists use electronic devices to do? 16. A.Track fish. B.Catch fish. C.Keep fish fresh. 17. 17.How does the man feel about the future sales of the special fish? A.Doubtful. B.Confident. C.Confused. 18. 听第10段材料，回答第18至20题。 19 18.What probably happened around Fountain Hills during last winter? 20 A.All animals died off. B.It didn't rain much. C.Many chemicals were used. 19.Why did a lot of bees disappear? A.They were eaten by birds. B.They were dying off themselves. C.They were killed by the government. 20.What do the scientists offer to do? A.To bring bees to the town. B.To tell people the importance of bees. C.To teach farmers how to grow food better. ○最音原女见129页 ·17·● M:Oh,I'm sorry to hear that.Don't worry.I can do that. W:That's great.Please also remember to tell each table of guests about our new menu special-it's a rice dish with many vegetables.I think it'll be very popular because many of our customers have been asking for more vegetari- an dishes..⑦ Text 7 W:Hi,Dad. M:Hi.You've been out a long time with your granddad today. W:I know.We went for a drive.I took some photos on my new phone.It's got an amazing camera. M:So,a good day then!I remember those pictures you took on the beach last week!And that great one of your brother climbing the rock. W:Well,I've taken some even better ones today.We stopped at this waterfall which is really high.You can even go behind it-so I did and I got a great picture of it. It's the best one I've taken.Look! Text 8 W:I don't know your family very well,John.I guess I haven't been to your house that often. M:No-you must come round again soon,and have dinner. My parents are quite fun.They come from up north, and then they moved down here when they decided to start a family. W:My family have always lived round here.So,do you get on well with your parents? M:Oh yeah,they're fine.They both work hard,so I don't see them so much. W:Same here.But I'm going to see everybody soon.I can't wait for this party we're having next month.Everyone's coming. M:That sounds like fun.I'm not happy these days though. W:Oh?Is something the matter? M:Well,it's just that I'm expected to follow tradition and join my uncle's company when I finish school,but I think it's boring.OK for a holiday job,maybe,but that's e- nough. Text 9 W:Why don't we go to the park this Sunday? M:Well,I really enjoyed it last week but remember that was a Tuesday.It's always very crowded at the week- end,especially when the weather's good. W:Well,I think it's nice and lively when there are more people in the park. M:Do you remember there was a band in the park last Tuesday?They gave a free concert.I was really impressed by the music. W:Yeah,it was fun!You know what I don't like about the park? ·1 …录音原文 M:What's that? W:Well,there is quite a bit of litter,especially near the children's playground.I'm quite disappointed by that. M:I think they should tell people not to drop litter by put- ting up more signs.But it's still one of the best places in town,isn't it? W:Oh yes,it's great.Why don't you ask Clara and Jim to come with us on Sunday? M:Clara's very busy these days.She may have no time.I will call Jim in a while. W:Great.I can't wait to get to the park. Text 10 I'm from Moscow,Russia,but my parents decided to send me to a boarding school in the middle of England.At first,I was very nervous because I didn't think I would make friends.I also thought that my English was't very good and that I wouldn't be able to communicate with people.When I arrived here,though,I realized it wasn't like that.There are lots of different nationalities here and we have English lessons too.Everyone is really friendly and we do many activities.I'm learning the violin and I play different sports.The best thing is the trips.We of- ten go to other towns in Britain and we learn a lot about the local culture.We also have concerts and plays that we put on ourselves.We're doing a school play at present. I'm not acting,but I'm helping with the lighting.I don't like the food here though.I suppose it's because I miss Russia cooking!But apart from that,I enjoy my life at boarding school. Week Two Monday 单元话题专项训练二 听力原文 Text 1 W:So what do you usually do in your free time? M:At the moment,I am spending much of my free time watching science inventions. W:Do you play any sports? M:Not much,but I go to the sports ground and work out once a week. Text 2 M:Lura,there is concern about how to increase students' interest in science as a school subject or future career. W:Well,there is a report that focuses on the view of students and puts forward suggestions for improving scientific spir- it.Let'have a look. Text 3 W:A science fair will take place at our university on Friday. Would you like to go? M:Absolutely!That will be interesting.I hope that will help develop my thinking skills. Text 4 M:Do you still have that book I lent you,Mary? 博朗英语听力Ⅱ W:It's just here Mark.I'm still partway through reading it. Normally I read horror fiction or love stories but this is fascinating！ M:I'm glad you like it.I'm not a fan of science space but I thought it was great. Text 5 W:John,I heard you had changed your major.Is that true? M:Yes,after studying business for half a year,I found I didn't really like it. W:So what are you studying now? M:Wildlife science. Text 6 W:Daddy,why is the sky blue? M:Oh,honey...it's a little hard to explain.There are things you don't understand about science yet. W:Oh.I thought it was because the ocean is blue.The sky is always looking at the ocean,so it should be blue,too. M:That's a very good idea,Ruby!That is very close to the real reason,too.The sky has a lot to do with the ocean. They're related in a way.Did you ever notice that they're never exactly the same colour?It's just like you and your brother Peter.You look alike because you're related,but you don't look exactly the same. Text 7 W:Hi Thomas,how are you enjoying the course so far? M:Well,I think it's good. W:Why did you decide to study sports science?Didn't you want to be a professional athlete when you were at school? M:Yeah,that was my goal,and all my classmates thought I would achieve it.They thought I was great. W:So what happened?Did your parents want you to be more academic？ M:Not at all.Perhaps they should have pushed me harder, though.I think I should have practiced more. W:What makes you say that? M:Well,I went to Kenya for a couple of weeks.I was cho- sen to run with some of the top teenage athletes in the world.I thought it was a great opportunity and felt ex- cited at first,but once we started competing,I quickly realized I wasn't good enough.All I felt was disappoint- ment in myself when I lost.So I just quit. W:That must have been a huge shock.I hope you can re- gain your confidence in the academic area. Text 8 W:I need more information from your side.Could you tell me something about yourself and your family? M:OK.I was born in Canada and lived there until I gradu- ated from high school.And then I majored in Computer Science at a university in the United States.After grad- uation,I hoped to live in Australia.So I came here.As to my family,my father is a civil engineer and my moth- er is a doctor.Both of my sisters are teaching at uni- versities. ·18 W:What made you decide to get into Computer Science? M:Well,I just like it. W:That's good.I'll let you know the result next week. M:Thank you. Text 9 W:In the studio today,I have Fergus Reilly,a scientist who works for a non-profit organization called Sustainable Fishing.Fergus,your particular concern is the future of fishing. M:That's right.We want more people to know what fish they're eating.According to some researchers,90%of the fish populations have gone,worse than the situation 50 years ago.But some fish populations can grow quite quickly if they are protected properly. W:I'm quite worried about the condition of some of the fish I see in supermarkets. M:I know what you mean.We've recently started using elec- tronic devices to track fish as they move from the oceans to the markets.This helps us check the quality, and this is important when it comes to threatened spe- cies. W:That's meaningful.But is it easy to encourage consumers' to buy fish that have been caught in an eco-friendly way? M:I'm confident that many customers do worry about our o- ceans.They won't mind paying a little bit more for this kind of fish.We do believe that we can sell these fish at a price that customers can afford. Text 10 W:In a small town of Fountain Hills and the nearby area, nature was dying off quickly.Some people thought it was because it hardly rained at all during last winter,and it was one of the driest winters the area had experienced on record.It was so bad that some people even thought that the government was doing secret chemical testing. The farmland around Fountain Hills was no longer pro- ducing good food.People were getting sick more often. One day,some scientists came to see if they could find out the cause.As they were walking through a field that was only half full of sunflowers,they noticed something unusual:the silence.Except a few black birds calling, there was no noise.They knew something important was missing the bees!The scientists rushed back to the town and discovered that the local government had been killing off the large population of bees there.Fortunately, the scientists came up with a solution.They offered to teach the local people about how bees are good for the en- vironment and their lives,and how bees would help the ar- eas start growing again.In the future,the scientists would remove bees from the town if the population of the bees grew too big again. 0Unit one science and scientists . week to monday单元话题专项训练二第一节听下面5段对话，每段对话后有一个小题，从题中所给的ABC3个选项中选出最佳选项。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题，每段对话读两遍。Text wine. So what do you usually do in your free time? At the moment, I am spending much of my free time watching science . inventions. Do you play any sports? Not much. But I go to the sports ground and work out once a week. So what do you usually do in your free time? At the moment, I am spending much of my free time watching science inventions. Do you play any sports? Not much. But I go to the sports ground and work out once a week. Text too, Laura. there is concern . about how to increased students interest in science as a school subject or future career. Well, there is a report that focuses on the view of students and puts forward suggestions for improving a scientific spirit. Let's have a look. Laura, there is concern about how to increase students interest in science as a school subject or future career. Well, there is a report that focuses on the view of students and puts forward suggestions for improving a scientific experience. What's up a work? Text three, a science fair will take place at our university on friday. Would you like to go? absolutely. That will be interesting. I hope they will help develop my thinking skills. A science fair will take place at our university on friday. Would you like to go? absolutely. That will be interesting. I hope they will help develop my thinking skills. Text for do you have . that book . i'd lent to marry? It's just here. mark. I am still part way through reading IT. Normally I read horror fiction or love stories, but this is . fascinating. Glad you like IT. I'm not a fan of science space, but I thought I was great. Do you have that book i'd lend you, mary? It's just here, mark. I'm still part way through reading IT. Normally I read horrifically or love stories, but this is fascinating. I'm glad you like IT. I'm not a fan of science space, but I thought I was great. Text five, john, I heard you had changed or major. Is that true? Yes, after studying business for half a year, I found I didn't really like IT. So what are you studying now? Wildlife science. John, I heard you had changed dorm, or is that true? Yes. after studying business for a half a year, I found I didn't really like IT. So what are you studying now? Wildlife science. 第二节听下面5段对话或独白。每段对话或独白后有几个小题，从题中所给的ABC3个选项中选出最佳选项。听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟。听完后各小题将给出5秒钟的作答时间。每段对话或独白读两遍，听第六段材料，回答第六、七题。现在你有10秒钟的时间阅读这两个小题。Text six, daddy, why is the sky blue? Oh, honey. it's a little hard to explain. There are things you don't understand about . science yet. Oh, I thought I was because the ocean is blue. The sky is always looking at the ocean, so IT should . be blue too. That's a very good idea, ruby, that is very close to the real reason to the sky has a lot to do with the ocean. They are related in a way. Did you ever notice that they are never exactly the same color? It's just like you and your brother, Peter, do you look like because you are related, but you don't look exactly the same. Daddy, why is the sky blue? Oh. honey, it's a little hard to explain. There are things you don't understand about science yet. Oh, I thought that was because the ocean is blue. The sky is always looking at the ocean. So IT should be blue too. That's a very good idea, ruby. That is very close to the real reason to the sky has a lot to do with the ocean. They're related in a way. Did you ever notice that they're never exactly the same color? Is just like you and your brother Peter, do you look like because you are related, but you don't look exactly the same? 听第七段材料，回答第8至10题。现在你有15秒钟的时间阅读这三个小题。Text seven hi, Thomas. How are you enjoying the course so far? Well. I think it's good. Why did you decide to study sports science? Didn't you want to be a professional athlete when you were at school? Yeah, that was my goal, and all my classmates thought I would achieve IT. They thought . I was great. So what happened? Did your parents want you to be more academic? Not at all. Perhaps they should have pushed me harder, though I think I should have practiced more. What makes you say that? Well, I went to kenya for a couple of weeks. I was chosen to run some of the top teenage athletes in the world. I thought I was a great opportunity and felt excited at first. But once we started competing, I quickly realized I wasn't good enough. All I felt was disappointment in myself when I lost, so I just quit. That must have been a huge shock. I hope you can regain your confidence in the academic area. Hi, Thomas. How are you enjoying the course so far? Well, I think it's good. Why did you decide to study sports science? Didn't you want to be a professional athlete when you . were at school? Yeah, that was my goal, and all my classmates thought I would achieve IT. They thought I was great. So what happened? Did your parents want you to be more academic? Not at all. Perhaps they should have pushed me harder, though I think I should have practiced more. What makes you say that? Well, I went to kenya for a couple of weeks. I was chosen to run with some of the top teenage athletes in the world. I thought IT was a great opportunity and felt excited at first. But once we started competing, I quickly realized I wasn't good enough. All I felt was disappointment in myself when I lost. so I just quit. That must have been a huge shock. I hope you can regain your confidence in the academic area. 听第八段材料，回答第11至13题。现在你有15秒钟的时间阅读这三个小题。Text eight, I need more information from your side. Could you tell me something about yourself and your family? okay. I was born in canada and lived there until I graduated from high school. And then I majored in computer science at a university in the united states. After graduation, I hope to live in australia. So I came here as to my family. My father is a civil engineer and my mother is a doctor. Both of my sisters are teaching at universities. What made you decide to get into computer science? Well, I just like IT. that's good. I'll let you know the result next week. Thank you. I need more information from your side. Could you tell me something about yourself and your family? okay. I was born in canada and lived there until I graduated from high school, and then I majored in computer science at a university in the united states. After graduation, I hope to live in australia. So I came here as to my family. My father is a civil engineer and my mother is a doctor. Both of my sisters are teaching at universities . what made you decide to get into computer science? Well, I just like IT. that's good. I'll let you know the result next week. Thank you. 听第九段材料，回答第14至17题。现在你有20秒钟的时间阅读这四个小题。Text nine in the studio today, I have focused rally, a scientist who works for a nonprofit organization called sustainable fishing focus. Your particular concern is the future of fishing. That's right. We want more people to know what fish they're eating. According to some researchers, ninety percent of the fish populations have gone worse than the situation fifty years ago, but some fish populations can grow quickly if they are protected properly. I'm quite worried about the condition of some of the fish icy and supermarket. I know what you mean. We've recently started using electronic devices to track fish as they move from the oceans to the markets. This helps us check the quality. And this is important when IT comes to threaten . species that meaningful, that is IT easy to encourage consumers to buy fish that have been caught in an ecofriendly way. I'm confident that many customers do worry about our oceans. They won't mind paying a little bit more for this kind of fish. We do believe that we can sell these fish at a Price that customers can afford. In the studio today, I have focus rally, a scientist who works for a nonprofit organization called sustainable fishing focus. Your particular concern is the future of fishing. That's right. We want more people to know what fish they're eating. According to some researchers, ninety percent of the fish populations have gone worse than the situation fifty years ago, but some fish populations can grow quickly if they are protected properly. I'm quite worried about the condition of some of the fish I, C. And supermarkets. I know what you mean. We've recently started using electronic devices to track fish as they move from the oceans to the markets. This helps us check the quality. And this is important when IT comes to threaten . species that meaningful, but is IT easy to encourage consumers to buy fish that have been caught in an ecofriendly way. I'm confident that many customers do worry about our oceans. They won't mind paying a little bit more for this kind of fish. We do believe that we can sell these fish at a Price that customers can afford. 听第十段材料，回答第18至20题。现在你有15秒钟的时间阅读这三个小题。Text ten in a small town of fountain hills and the nearby area, nature was dying off quickly. Some people thought I was because IT hardly rained at all during last winter, and IT was one of the drift winters the area had experienced on record. IT was so bad that some people even thought that the government was doing secret chemical testing. The farmland around fountain hills was no longer producing good food. People were getting sick more often. One day, some scientists came to see if they could find out the cars as they were walking through a field that was only hand full of sunflowers. They noticed something unusual. The silence, except a few blackbirds calling. There was no noise. They knew something important was missing the bees. The scientists rushed back to the town and discovered that the local government had been killing off the large population of bees there. Fortunately, the scientists came up with a solution. They offered to teach the local people about how bees are good for the environment and their lives, and how bees would help the areas start growing again in the future. The scientists would remove fees from the town if the population of the bees grew too big again. In a small town of fountain hills and the nearby area, nature was dying off quickly. Some people thought I was because IT hardly rained at all during last winter, and IT was one of the driest winters the area had experienced on record. IT was so bad that some people even thought that the government was doing secret chemical test. The farmland around fountain hills was no longer producing good food. People were getting sick. More of him. One day, some scientists came to see if they could find out the cause as they were walking through a field that was only half full of sunflowers, they noticed something unusual. The silence, except a few blackbirds calling. There was no noise. They knew something important was missing the bees. The scientists rushed back to the town and discovered that the local government had been killing off the large population of bees there. Fortunately, the scientists came up with a solution. They offered to teach the local people about how bees are good for the environment and their lives, and how bees would help the areas start growing again in the future. The scientists would remove fees from the town if the population of the bees group too big again. Monday 1-5 CACAA Week One 6-10 CBACC 11-15 ACCCA 16-20 BCBAB Monday 1-5 CBBAA Week Two 6-10 BABAC 11-15 CBAAC 16-20 ABBCB Monday 1-5 BBBCC Week Three 6-10 ABABC 11-15 BCAAB 16-20 CCCCA Monday 1-5 BAAAB Week Four 6-10 CBBAB 11-15 CCCBC 16-20 BCBCA Monday 1-5 CBBAC Week Five 6-10 CBABA 11-15 CCCBA 16-20 BCABC Monday 1-5 BCCAC Week Six 6-10 ABABA 11-15 BCABC 16-20 ABCAC Monday 1-5 ACBBA Week Seven 6-10 CBBAA 11-15 CCCBA 16-20 CBAAC Monday 1-5 AACBB Week Eight 6-10 BCBAB 11-15 CABCA 16-20 CABAB Monday 1-5 CABCB Week Nine 6-10 BABCA 11-15 ABABC 16-20 CCBAA Monday 1-5 AACCA Week Ten 6-10 CBBCB 11-15 CBBBA 16-20 BCBBC 答案速查 Tuesday Wednesday 1-5 BBCBA 1- 5 BCCBA 6-10 ABBCA 6-10 BBACA 11-15 CBAAC 11-15 BBAAA 16-20 CBCCA 16-20 CACCA Tuesday W ednesday 1-5 CCCBA 1-5 AACAC 6-10 BAAAC 6-10 ACCBC 11-15 CBABC 11-15 ABBCC 16-20 AABBA 16-20 AACCB Tuesday Wednesday 1-5 ABCAB 1-5 ABAAB 6-10 BACBB 6-10 CCCBA 11-15 ABBAC 11-15 BCABC 16-20 CBCBC 16-20 CCBAA Tuesday Wednesday 1-5 BBCBA 1-5 BACBA 6-10 AAACB 6-10 ABACA 11-15 BACCA 11-15 CBCAB 16-20 BBABC 16-20 BAbca Tuesday Wednesday 1-5 ABBCB 1-5 BCCBB 6-10 CAACA 6-10 BCACB 11-15 CACBC 11-15 BACAC 16-20 BCCBA 16-20 ACCCB Tuesday W ednesday 1-5 AACBB 1-5 CCBAC 6-10 CCABC 6-10 BCABA 11-15 BCABA 11-15 CBCCC 16-20 CACAB 16-20 ABBCC Tuesday W ednesday 1-5 AAcBc 1-5 CCACA 6-10 ABACA 6-10 CCBCC 11-15 CBCBB 11-15 CAABA 16-20 CCBCA 16-20 ACCAB Tuesday Wednesday 1-5 BCBCA 1-5 AABAB 6-10 ABABA 6-10 BACBB 11-15 CBCBB 11-15 BCACB 16-20 CCACB 16-20 ACBBC Tuesday Wednesday 1-5 BCCAB 1-5 BCABB 6-10 BABCC 6-10 CABCA 11-15 CBBAC 11-15 ACCCA 16-20 BAACA 16-20 ABBAC Tuesday Wednesday 1-5 ACBBC 1-5 BCBCA 6-10 CCABA 6-10 BACCB 11-15 ABABC 11-15 CBCBB 16-20 AABBA 16-20 AABCB ·183· 参考答案 Thursday Friday 1-5 CCABB 1-5 BCAAC 6-10 CBCBB 6-10 BACBA 11-15 BACBA 11-15 ACCBB 16-20 BAAAC 16-20 ABCBC Thursday Friday 1-5 CBACA 1-5 AAAAB 6-10 CBABC 6-10 BCBAA 11-15 BABCA 11-15 ABBCC 16-20 BCABA 16-20 BCCBA Thursday Friday 1-5 CBCAB 1-5 CAAAC 6-10 CBACB 6-10 ABCAC 11-15 CBBBA 11-15 BAACB 16-20 BCACC 16-20 CBBAC Thursday Friday 1-5 CBBAC 1-5 BBAAC 6-10 ABCAB 6-10 CBBAB 11-15 CBAAC 11-15 CBCCB 16-20 BCBAC 16-20 ACACB Thursday Friday 1-5 CCBBA 1-5 CCABB 6-10 ACCBB 6-10 ABABA 11-15 ABACC 11-15 AACBB 16-20 AACBB 16-20 Abcac Thursday Friday 1-5 ABCAB 1-5 BBAAC 6-10 CACBA 6-10 CCACA 11-15 BBBCA 11-15 BBCAB 16-20 CCBAC 16-20 BCBBA Thursday Friday 1-5 BBBCB 1-5 CAACB 6-10 ABCAc 6-10 ACACA 11-15 BACBC 11-15 CCAAB 16-20 16-20 AAAAB Thursday Friday 1-5 ACBAA 1-5 CABBA 6-10 BCABC 6-10 CAAAC 11-15 ABCAC 11-15 CABBC 16-20 ABBCA 16-20 AABCB Thursday Friday 1-5 CBBCA 1-5 ACCBA 6-10 ACBBC 6-10 BBBAC 11-15 ABACC 11-15 CBCCC 16-20 ABAAC 16-20 ABBcc Thursday Friday 1-5 CBCAC 1-5 BBCCA 6-10 BCCBA 6-10 ACCBA 11-15 AABAA 11-15 BABAC 16-20 BBBAA 16-20 ABACC