Unit 1 Topic 2 Section C1 课件-2025-2026学年仁爱科普版英语九年级上册

The population in developing countries is growing faster. Section C Unit 1 Topic 2 01 能够掌握并正确运用新学习的语言知识: social, natural, worse, government, offer, supply, paragraph, opportunity, newborn, percent, one fifth of, because of/thanks to, take measures to do sth., work well in (doing) sth.等 02 如何通过语境和构词法，猜测生词、短语大意，并感知其用法。 03 如何在阅读过程中找出文章主题和各个段落的Topic sentence。 04 在口头报告和书面写作时，能合理使用topic sentence和supporting details组织文章结构。 Pre-reading 2. Complete the following passage with the correct forms of the given words or phrases. grow reach have find work become face carry out Every minute, about 261 babies are born in the world. That means people have to _____ food for about 375 840 newborn babies every day. The world’s population _______________ very fast. It has _______ one of the biggest social problems today. China ______ the largest population in the world. There are about 1.37 billion people in China. It has ________ 20 percent of the world’s population. China has ____________ some policies to solve the population problem, and these policies have _______ well. But China still _______ a serious population problem. find grows/ is growing become carried out reached has worked faces While-reading Fast reading to write the title of the passage. Tip:文中反复出现的词一般是体现主旨的关键词。 Population Problems 一. 主旨大意题： 定位主题句的方法 主题句是文章的首句 主题句在文末 主题句在中段 主题句需归纳 注意重复词 ①新闻报道类文章首句是主题句。 ②首句语言精练，中间段多角度说明论证，且与尾段句子呼应，则首句是文章主题句。 → 夹叙夹议类记叙文末的议论部分隐含主题句。 → → → → 文章首段是举例子或谈论个别现象时，主题句则在后面的段落。 主题句不明确时，归纳每一段主题句，整合为全文大意。 文中反复出现的词一般是体现主旨的关键词。 补充页 Fast reading to match the main idea with each paragraph. 1. ____ Paragraph 1 A. the measures to deal with the problems 2. ____ Paragraph 2 B. the world’s and Asia’s population 3. ____ Paragraph 3 C. the problems caused by large population B C A Scanning the article again and complete the table. Population of China ____________________ Social problem less ______________ fewer _______ opportunities less ____________ and __________ crowded ___________ heavy ____________ ___________ natural environments Government measure _______________________________ 1.37 billion living space job water energy cities traffic worse the one-child policy and others Read Paragraph 1 and fill in the blanks. In 2010, the world's population was about 6.8 billion. _____________ three billion people live in Asia now. That's almost __________ the world's population. The world’s and Asia’s population. More than half of Read Paragraph 1 and fill in the blanks. 3 billion÷ 7.2 billion≈1／2 (half) 50 percent (50%) Almost half of the people in the world live in Asia. What is the current population? Read Paragraph 2 and answer the question. What social problems has it caused ? The problems caused by large population. 1.37 billion÷7.2 billion≈1 ／ 5 20 percent (20%) one fifth About one fifth of the people in the world live in China. Read Paragraph 2 and answer the question. What social problems has it caused ? Because of the large population, there is __________________ for each family. less living space Read Paragraph 2 and answer the question. What social problems has it caused ? Because of the large population, it is difficult for lots of people ______________. to find jobs Read Paragraph 2 and answer the question. Because of the large population, it is hard for China to supply _______ and ______ to _________ people’s daily needs. energy water satisfy Read Paragraph 2 and answer the question. Because of the large population, most cities are ______________ than before, and the traffic is much __________. more crowded heavier Read Paragraph 2 and answer the question. Because of the large population, natural environments are becoming ____________________. worse and worse Read Paragraph 3 and answer the question. The one-child policy — Every couple can have only one child. How to solve the problem? Post-reading 3a Work in groups and search for the information about the following questions. Then share your idea with your group members. 1. How do you think we can get more living space? 2. What should the government do to offer more job opportunities? 3. The energy and water is less and less. What should we do to deal with it? 4. The traffic in cities is much heavier than before. How can we solve the problem? 3bWrite a short passage of three paragraphs based on 3a. China has the largest population in the world. It has caused many problems. Everyone should do something to solve them. First, the government should keep the one-child policy to control the increasing population, and practice the reform and opening-up to develop our economy. Only in this way can we get more jobs and improve our living conditions. Second, the energy and water is becoming less and less. We’d better save them as much as possible, and try to find more new energy. In order to solve the problem of heavy traffic, we call on everyone to take a bus or walk as often as possible. Further reading China is a great country with the largest population in the world. In order to solve the population problem, our government decides to implemented one-child policy. When it is carried out for some time, many people not only see its advantages but also disadvantages. Thus, people argue that two-child policy should be put into effect. In my opinion, two-child policy should be carried out. First of all, two-child policy is the gift for some only child. For some families, maybe the parents are only child and they also can have only child. Put aside the loneliness of their child, when their child grows up and they grow older, their child marry with an only child girl accidentally, the burden on their child and his wife is unimaginable heavy. Their child and his wife have to take care of two old couples. Usually, a young couple looking after an old couple is a little difficult; if the pressure increasing twice, how can they stand it. But if their parents have two children, they can share the burden of taking care of their parents. It would be much better. Secondly, two-child policy can guarantee the number of Chinese population. As the widely spread of one-child policy, some people have changed their conception about giving birth. If they firmly believe one-child policy, there will be more and more the dink. After several decades, our country will famous for lack of population. In conclusion, one-child policy has out of date. And tow-child policy is needed and necessary. It can solve the problem of nowadays and the future. What’s the main idea of the article? Further reading Further reading Thinking question: Why does government decide to implement (执行) three-child policy? 课后作业 学生自己课下查询 Can you find out the following phrases? 1.五分之一 2.五分之三 3.因为、由于 4.生存空间 5.社会问题 6.同时 7.引起许多其他问题 8.满足人们的日常需求 1.one fifth 2. three fifths 3. because of 4. living space 5.social problems 6. at the same time 7. cause many other difficulties 8.satisfy people’s daily needs Can you find out the following phrases? 9.到目前为止 10.作为...而出名 11.因为...而出名 12.被...所熟知 13.在做某事方面很有成效 14.多亏/由于 15.自然环境 9. so far 10. be known as = be famous as 11. be known for= be famous for 12. be known to = be famous to 13. work well in doing sth 14. thanks to / because of/with the help of 15.natural environments Language points 1. and about one fifth of the people in the world live in China. one fifth “五分之一” 【例子】1/3 1/4 【注意】 ①分子大于1时，分母序数词加s. 【例子】2/3 7/9 ②带分数：基数词+and+分子基数词+分母序数词 【例子】2 ¾ 英语分数表达法：分子为基数词，分母为序数词。先读分子再读分母 one third one fourth two thirds seven ninths two and three fourths Language points 1. and about one fifth of the people in the world live in China. 1/2 1/4 3/4 特殊 one/a half a quarter three quarters 分数做定语时，与修饰的名词之间加of。 【例子】 在我们班五分之三的学生是女生。 _________________________________________________ Three fifths of the students in our class are girls. 拓展 分数、百分数作主语或修饰名词、代词作主语，谓语动词的单复数由分数、百分数后面跟的名词、代词决定。 Language points 1. and about one fifth of the people in the world live in China. 【例子1】 五分之三的学生已经通过了考试。 _________________________________________________ Three fifths of the students have passed the exams. 【例子2】 由于糟糕的天气，面包坏了一半。 _________________________________________________ One half of the bread has gone bad because of the bad weather. Language points 2. Because of the large population, there is less living space for each family. because of “由于、因为”后加名词、代词、动名词 链接 【例子】 莉莉由于腿不方便，行走缓慢。 _________________________________________________ Lily walked slowly because of her bad leg. because 后加从句 【例子】 由于天气恶劣，玛丽只得待在家。 _________________________________________________ Mary had to stay at home because the weather was bad. Mary had to stay at home because of the bad weather. Language points 3. it’s hard for China to supply water and energy to satisfy people’s daily needs. supply “供应、提供”指定期供应 搭配 【例子】 母牛供给我们牛奶。 _________________________________________________ Cows supply milk to us. supply sth to sb = supply sb with sth 给某人提供某物 Cows supply us with milk. Language points 3. it’s hard for China to supply water and energy to satisfy people’s daily needs. 注意 【例子】 他提供给我一份工作。 _________________________________________________ He offered me a job. offer sb sth = offer sth to sb 为某人提供某物 He offered a job to me. offer v. “主动提出，自动给予” offer to do sth 主动提出做某事 【例子】 他主动提出开车送我回家。 _________________________________________________ He offered to drive me home. Language points 3. it’s hard for China to supply water and energy to satisfy people’s daily needs. 注意 【例子】 村民们给我们提供食物。 _________________________________________________ The villagers provided us with food. provide sb with sth = provide sth for sb 给某人提供某物 The villagers provided food for us. provide v. “提供、供给” Language points 3. it’s hard for China to supply water and energy to satisfy people’s daily needs. 注意 【例子】 老师们把旧书给贫困地区的孩子了。 _________________________________________________ The teachers gave the kids in the poor areas old books. give sb sth = give sth to sb 给某人某物 The teachers gave old books to the kids in the poor areas. give v. “给、赠送” 及时练习 ( )1.Luckily, the local hospital promised to ______the poor child with free medical treatment. A. share B. give C. provide D.offer ( )2.Instead of throwing away all these old clothes, we can simply ______them to people who need them. A. take B. give C. provide D.compare ( )3.Yesterday I saw a little boy ______his seat to an old lady, which got praise from other passengers. A. compare B.take C. provide D.offer C B D 及时练习 ( )4.The government will ______food for homeless children. A. offered B. give C. provided D.provide ( )5.We______him a cup of coffee. A. offers B. supplied C. offered D.provided ( )6.The firm have ______me with a car. A. compared B.offered C. provided D.supply D B C Language points 4. So far, our government has taken many measures to slove the population problem. 注意 【例子】 到目前为止，我们已经学了2,000多个单词了。 _________________________________________________ We have learnt over 2,000 words so far. so far “到目前为止、迄今为止”常于现在完成时连用 注意 take measures to do sth 采取措施做某事 【例子】 政府应该采取措施改善生活水平。 _________________________________________________ The government should take measures to improve living standards. Language points 5. One was known as the one-child policy. 【例子】 齐白石作为画家而闻名于世。 _________________________________________________ Qi Baishi was known/famous as an artist in the world. be known as “作为...而出名”= be famous as 注意 be known for “因为...而出名”= be famous for 【例子】 那位电影明星以精湛的演技而出名。 _________________________________________________ The film star is known/famous for her fine acting. be known to“为...所熟知” 及时练习 ( )1.Li Ming got the first in the English speech contest of our city. He_____our school. A. is known for B. is known to C. is known as ( )2.--What do you know about Xiangyang? --It’s ______its state level scenic spot-Gulongzhong. A. famous as B. different from C. similar to D.known for ( )3.Hanghzhou is______West Lake. A. is known for B. is known to C. is known as B D A Language points 6. It worked well in controlling China’s population. 【例子】 做眼保健操在保护我们的视力方面起到了明显作用。 _________________________________________________ Doing exercises works well in protecting our eyesight. work well in sth/doing sth“在某方面起明显作用” 链接 work at “在...方面下功夫” 【例子】 良好的人际关系不会自己形成，你得下功夫。 _________________________________________________ Successful relationships don’t just happen. You have to work at them. work out“计算、算出” work on “从事、致力于” Language points 7. Thanks to the policy.... 【例子】 多亏了这场大雨，我们的庄稼得救了。 _________________________________________________ Thanks to the heavy rain, our crops are saved. thanks to sb/sth“幸亏、由于”= because of= with the help of 链接 thanks for“为...而感谢（原因）”= thank you for 【例子】 感谢你的字典。 _________________________________________________ Thanks for your dictionary. Practice 用英文写出下列分数 1. 1/3_____________ 2. 2/3_____________ 3. 2/5_____________ 4. 5/6_____________ 5.6/7_____________ 6.1/9_____________ 7.3/4_____________ _____________ 8.1/2_____________ 9.4¼ _____________ 10. 8/10_____________ one/a third two thirds two fifths five sixths six sevenths one ninth three fourths three quarters a/one half four and one fourth eight tenths 根据句意或首字母补全单词 1. Puppy love （早恋）among the students is not only a school problem but also a s__________ problem. 2.Chinese g__________ is trying to save this kind of special language. It is dying. 3.Many Chinese families couldn’t o__________ their children a good education in the past. 4.The condition of the patient is gettiing much w__________ than before. 5.Many countries have taken measures to protect their environment. Then n__________ environments are changing for the better. ocial overnment ffer orse atural 单项选择 ( )1.About ______of the population in the area_____farmers. A. three fourth;is B. three fourths;is C. three quarters;are D. three quarters;is ( )2.Today, because of the large population, there is_____space for us, and traffic is much_______. A. more;crowded B. less; heavy C. less; heavier D. much; crowded ( )3.Wang Junkai ______a singer. A. is famous for B. is know as C. is known for D. is known as C C D 单项选择 ( )4.Nearly ______of the earth_____covered by sea. A. three fourth;is B. three fourths;is C. three fourth;are D. three fourths; are ( )5.Because of the large population, we have fewer place_______. A. to live B. live in C. to live in D. live ( )6.We have no time to do so many things. Maybe we can ______this plan next year. A. take out B. get out C. carry out D. do ( )7.Judy ______the math problem herself. A. worked out B. works in C. worked D. worked on B C C A 单项选择 ( )8.--Have you seen the film_____? --Yes, I have, I saw it ten years______. A. before;before B.before;ago C. ago;before D. ago;ago ( )9.It’s difficult _____me_______learn English. A. of; for B. for; to C. to; to D. to;for ( )10.Doing eye exercises______well in _____ our eyesight. A. do;protecting B. does; protect C. works;protecting D. work; protect B B C 根据汉语提示完成句子 1.These measures __________ __________ well in __________ （已有效地保护）our homeland. 2. __________ __________（因为）the fine weather, my son can play in the open air. 3.__________ __________（至今）, he has learnt about 1000 words. 4. How will you __________ __________（处理）your life and your work? 5. __________ __________（自然环境）are becoming worse and worse in the world now. 6.We should __________ __________ __________（采取措施）solve the population problems. have worked protecting Because/Thanks of/to So far deal with Natural environments take measures to 根据汉语提示完成句子 7. 到目前为止，大约七分之五的同学已经加入了游泳队。 __________ __________, about __________ __________ of the students __________ __________the swimming team. 8.这想新政策对改善环境起到了很好的作用。 The new policy has __________ __________ __________ __________our environment. 9.多亏了这位好心人， 我找到了丢失的自行车。 __________ __________this kind man, I found my lost bike. 10.一名警官昨天给我们提供了帮助。 A policeman __________ help __________us yesterday. So far five sevenths have joined worked well in improving Thanks to offered to null 181056.0 $$