Unit 6 Looking into Science课时3 DNA is fantastic! 课时练习 2026-2027学年冀教版九年级英语上册

**基本信息** 初中英语冀教版九年级上Unit 6课时3同步练，分层清晰，从基础词汇句型到综合语篇应用，梯度合理，助力语言能力与思维品质提升。 **分层设计** |层次|知识覆盖|设计特色| |----|----------|----------| |基础层|核心词汇与基础句型|单词/词组默写（23分）、完成句子（20分）、词形填空（10分），夯实课时基础词汇与语法| |进阶层|词汇语境运用与语篇衔接|选词填空（10分）、阅读还原（10分），通过短文语境强化词汇运用与逻辑衔接| |综合应用层|综合语篇理解与表达|阅读理解（30分）、完形填空（10分）、阅读回答（10分），考查信息获取、推理判断及表达能力，体现思维品质|

2026-2027学年冀教版九年级上 Unit 6 Looking into Science课时3 DNA is fantastic! 课时练习 一、单词默写（根据汉语提示写出对应的英文单词，每题1分，共15分） 1. 蓝图（n.）__________ 2. 复杂的（adj.）__________ 3. 独特的（adj.）__________ 4. 识别；确认（v.）__________ 5. 亲戚；亲属（n.）__________ 6. 条件；状况（n.）__________ 7. 基因的（adj.）__________ 8. 相互作用；互动（v.）__________ 9. 编辑（v.）__________ 10. 预防（v.）__________ 11. 诊断（v.）__________ 12. 治疗（v.）__________ 13. 数据（n.）__________ 14. 复制品；副本（n.）__________ 15. 模式；图案（n.）__________ 二、词组默写（根据汉语提示写出对应的英文短语，每题1分，共8分） 1. 蓝图；设计方案 __________ 2. DNA测试 __________ 3. 基因疾病 __________ 4. 扮演重要角色 __________ 5. 在不久的将来 __________ 6. 与……相互作用 __________ 7. 与……有关系；与……相关 __________ 8. 不仅……而且…… __________ 三、完成句子（根据汉语提示完成英文句子，每空词数不限，每题2分，共20分） 1. 蓝图是一幅显示如何建造某物的图纸。 A blueprint is a ______ that shows how to ______ something. 2. 创造一个人的蓝图叫做DNA。 The blueprint to ______ a person is ______ DNA. 3. 除了某些双胞胎外，每个生物都有自己独特的DNA。 ______ for some twins, each living thing has its own ______ DNA. 4. 科学家不仅可以识别你，还可以识别你的亲属。 Scientists can identify ______ only you, ______ also your relatives. 5. 你的手指和你的头发有相同的DNA。 Your finger has the ______ DNA ______ your hair. 6. 一些健康问题可能由你的DNA问题引起。 Some health ______ can be ______ by problems in your DNA. 7. 科学家可以寻找这些问题，有时在你生病之前帮助你。 Scientists can look for these problems and, ______, help you ______ you become sick. 8. 未来技术将使科学家更好地了解基因如何相互作用。 Future technologies will ______ scientists to better understand how genes ______. 9. 未来，它将被用于诊断和治疗疾病。 In the future, it ______ ______ ______ to diagnose and treat diseases. 10. DNA在我们的健康和技术中发挥着重要作用。 DNA ______ an important ______ in our health and technology. 四、用括号内所给词的适当形式填空（每题1分，共10分） 1. Each living thing has its own ______ (uniquely) DNA. 2. Scientists can identify not only you but also your ______ (relate). 3. Some health ______ (condition) can be caused by problems in your DNA. 4. Genes will be ______ (edit) to prevent genetic diseases. 5. DNA will be ______ (wide) studied and researched in the coming years. 6. The structure of the passive voice in simple future tense is will + be + v-______ (ed). 7. An exhibition of model planes ______ (hold) at the Science Museum next week. 8. The new science lab ______ (build) in the coming year. 9. More fantastic facts about DNA ______ (discover) in the near future. 10. Future technologies will be used ______ (help) scientists better understand DNA. 五、选词填空（阅读短文，从方框中选择恰当的词并用其适当形式填空，每空1分，共10分）  blueprint · identify · relative · complex · interact · edit · prevent · diagnose · unique · pattern DNA is like a 1. ______ for building a living being. It contains all the instructions needed to create you. Your DNA is 2. ______ to you — no one else has the same DNA, except for some twins. Scientists can 3. ______ people by studying their DNA. They can also find out who your 4. ______ are. DNA is very 5. ______, but scientists are learning more about it every day. In the future, DNA will be used to 6. ______ diseases before they appear. Genes may be 7. ______ to fix problems and 8. ______ genetic disorders. Scientists are also studying how genes 9. ______ with each other. The 10. ______ of DNA research is helping us understand life itself. 六、阅读还原（阅读短文，从方框中选出能填入空白处的最佳选项，其中有一项多余，每题2分，共10分） A. This process is called gene editing. B. They can also be used to predict health problems. C. However, DNA testing also raises some concerns. D. That means we need to use this technology wisely. E. For example, some people worry about privacy issues. F. DNA testing has become more common and affordable in recent years. DNA technology has developed rapidly in recent years. Scientists can now study DNA more easily than ever before. 1. ______ Many people use DNA testing to learn about their family history and find relatives they never knew they had. DNA tests are not just for fun, though. 2. ______ Doctors can use DNA information to find out if a person has a higher risk of certain diseases. This allows patients to take steps to stay healthy. 3. ______ DNA contains very personal information. If it is not protected, it could be misused. 4. ______ They want to know who can access their DNA data and how it will be used. Despite these concerns, the future of DNA technology is bright. It will help us cure diseases, improve agriculture, and understand our history. 5. ______ With careful use, DNA technology can benefit everyone. 七、阅读理解（阅读短文，从每题所给的A、B、C、D四个选项中选出最佳选项，每题2分，共30分） A How DNA Shapes Who You Are Have you ever wondered why you look like your parents? The answer lies in your DNA. DNA is the biological blueprint that determines many of your physical characteristics. It influences your height, eye colour, hair colour, and even the shape of your face. However, DNA does not determine everything about you. Your environment and experiences also play an important role. For example, you may have a genetic tendency to be tall, but if you don't get proper nutrition when you are growing up, you might not reach your full height. Similarly, you might have genes that make it easier to learn music, but you still need to practise to become a good musician. Scientists have also discovered that some personality traits may be influenced by DNA. Things like being outgoing, shy, or adventurous may have a genetic component. However, your upbringing and life experiences also shape your personality. This combination of nature (your DNA) and nurture (your environment) makes each person truly unique. ( )1. What does DNA determine according to the passage? A. Only a person's personality. B. Many physical characteristics. C. A person's entire future. D. Only a person's eye colour. ( )2. What does the writer say about height and nutrition? A. Height is only determined by DNA. B. Proper nutrition can help reach full height. C. Nutrition has no effect on height. D. Height is determined by exercise. ( )3. Which of the following personality traits may have a genetic component? A. Musical ability. B. Being outgoing, shy, or adventurous. C. Artistic talent. D. Sports skills. ( )4. What does the underlined word "nurture" in the last paragraph mean? A. 基因 B. 遗传 C. 环境与培养 D. 食物 ( )5. What is the main idea of this passage? A. DNA determines everything about a person. B. DNA, environment, and experiences all shape who we are. C. Personality is only influenced by upbringing. D. Scientists have discovered all the secrets of DNA. B The Future of DNA Technology DNA technology is one of the most exciting fields of science today. It has the potential to revolutionise medicine, agriculture, and many other areas. In medicine, DNA testing is already being used to diagnose diseases more accurately. Doctors can identify genetic mutations that cause diseases like cancer and heart disease. In the future, gene therapy may be used to fix these mutations, curing diseases that are currently incurable. In agriculture, DNA technology is being used to develop crops that are more resistant to pests, diseases, and drought. This could help feed the growing global population. Scientists are also using DNA to create medicines and vaccines more efficiently. However, DNA technology also raises ethical questions. Should we be able to design our babies' physical characteristics? How should we protect people's genetic information from being misused? These are difficult questions that society will need to answer in the coming years. ( )6. What is the main idea of this passage? A. DNA technology is only useful in medicine. B. DNA technology has great potential but also raises ethical questions. C. DNA technology will be used to design babies. D. DNA technology is too dangerous to use. ( )7. What does "gene therapy" refer to in the passage? A. Testing genes. B. Using genes to make medicine. C. Using genes to treat or cure diseases. D. Studying genes in animals. ( )8. How can DNA technology help agriculture? A. By creating new farm animals. B. By developing more resistant crops. C. By reducing the need for water. D. By making food taste better. ( )9. What is one ethical question raised by DNA technology? A. How to make DNA tests cheaper. B. Whether we should design babies' characteristics. C. How to store DNA data. D. Which diseases to study first. ( )10. What is the writer's attitude towards DNA technology? A. It is completely positive and has no problems. B. It is completely negative and should be stopped. C. It has great potential but needs careful consideration. D. It is not important for everyday life. C A Family Mystery Solved by DNA When I was a child, my grandmother always told me stories about our family history. She said that we had ancestors who came from a faraway country. But she could never remember the name of the place. I was always curious about this mystery. Last year, I decided to take a DNA test. I sent a sample of my saliva to a company that specialises in ancestry testing. A few weeks later, I received the results. The report said that I had ancestors from three different continents: Europe, Asia, and Africa. I was shocked! I had no idea that my family history was so diverse. The DNA test also connected me with several distant relatives I had never met. One of them, a woman living in Australia, shared old family photos with me. I finally learned the name of the country my grandmother had talked about — it was a small country in Eastern Europe. This experience made me realise how powerful DNA technology is. It can unlock the secrets of our past and connect us with people we never knew existed. I'm grateful to have had this opportunity to learn more about who I am. ( )11. What was the writer's family mystery? A. Where her ancestors came from. B. How many relatives she had. C. What her grandmother's name was. D. Why her family moved. ( )12. What did the writer send to the company? A. A letter. B. A photo. C. A sample of her saliva. D. A family tree. ( )13. What did the DNA test reveal about the writer's ancestors? A. They all came from one country. B. They came from three different continents. C. They were all from Europe. D. They were all from Asia. ( )14. Where did one of the writer's distant relatives live? A. In Europe. B. In Asia. C. In Africa. D. In Australia. ( )15. What is the writer's feeling about the DNA test experience? A. She regrets taking it. B. She found it unhelpful. C. She is grateful for the experience. D. She thinks it was a waste of money. 八、完形填空（阅读短文，从每题所给的A、B、C、D四个选项中选出最佳选项，每题1分，共10分） I have always been interested in science, especially biology. My interest 1. ______ when I first learned about DNA in a science class. I was amazed that something so 2. ______ could hold so much information. Last term, our teacher 3. ______ us to do a project about DNA. I chose to study how DNA influences 4. ______. I learned that many physical traits, like eye colour, are 5. ______ by DNA. I also discovered that some diseases are 6. ______ to our genes. One thing I found really interesting is that DNA can be used to identify people. This is 7. ______ in criminal investigations. Police can use DNA evidence to 8. ______ who committed a crime. It can also be used to prove that someone is innocent. After finishing the project, I became even more 9. ______ about DNA. I think it is one of the most 10. ______ topics in science. I hope to learn more about it in the future. ( )1. A. ended B. started C. finished D. changed ( )2. A. big B. small C. heavy D. simple ( )3. A. advised B. ordered C. asked D. warned ( )4. A. personality B. appearance C. intelligence D. memory ( )5. A. determined B. recorded C. forgotten D. imagined ( )6. A. connected B. similar C. different D. close ( )7. A. boring B. dangerous C. useful D. difficult ( )8. A. argue B. find out C. give up D. think about ( )9. A. worried B. excited C. tired D. bored ( )10. A. expensive B. difficult C. exciting D. private 九、阅读回答（阅读短文，回答后面的问题，每题2分，共10分） DNA and Privacy As DNA testing becomes more popular and affordable, more people are choosing to learn about their genetic information. They want to find out about their ancestors, their health risks, and their relatives. However, this trend also raises important questions about privacy. When you take a DNA test, you are sharing your most personal information with a company. This information can reveal not only information about you, but also about your family members. Some people worry that this information could be used against them — for example, by insurance companies or employers. Another concern is how DNA data is stored and shared. If the data is not properly protected, it could be stolen or leaked. Some companies may also share genetic data with other organisations without the user's permission. To address these concerns, many countries are creating laws to protect genetic privacy. Experts also recommend that people read the privacy policies of DNA testing companies carefully before they decide to take a test. 1. Why are more people choosing to take DNA tests?   2. What personal information does a DNA test reveal?   3. What do some people worry about regarding DNA information?   4. What is one concern about how DNA data is handled?   5. What do experts suggest people do before taking a DNA test?   参考答案 一、单词默写 1. blueprint 2. complicated / complex 3. unique 4. identify 5. relative 6. condition 7. genetic 8. interact 9. edit 10. prevent 11. diagnose 12. treat 13. data 14. copy 15. pattern 二、词组默写 1. a blueprint / blueprint 2. DNA testing 3. genetic disease 4. play an important role in 5. in the coming years / in the near future 6. interact with 7. be related to 8. not only... but also 三、完成句子 1. drawing; build 2. create; called 3. Except; unique 4. not; but 5. same; as 6. conditions; caused 7. sometimes; before 8. allow; interact 9. will be used 10. plays; role 四、词形填空 1. unique 2. relatives 3. conditions 4. edited 5. widely 6. ed 7. will be held 8. will be built 9. will be discovered 10. to help 五、选词填空 1. blueprint 2. unique 3. identify 4. relatives 5. complex 6. diagnose 7. edited 8. prevent 9. interact 10. pattern 六、阅读还原 1. F 2. B 3. C 4. E 5. D 七、阅读理解 1. B 2. B 3. B 4. C 5. B 6. B 7. C 8. B 9. B 10. C 11. A 12. C 13. B 14. D 15. C 八、完形填空 1. B 2. B 3. C 4. B 5. A 6. A 7. C 8. B 9. B 10. C 九、阅读回答 1. Because they want to learn about their ancestors, health risks, and relatives. 2. It reveals information about you and your family members. 3. They worry that it could be used against them by insurance companies or employers. 4. DNA data could be stolen, leaked, or shared without permission. 5. They suggest reading the privacy policies of DNA testing companies carefully. 学科网（北京）股份有限公司 $