懂你英语LUnit3

1、Unit 3-1 ListeningThere are many forms of lives on earth, including human beings. Life exists ina variety of conditions.Some forms of live live in the watery environment, like the oceans. Other forms of lives can be found in very dry areas like desserts. However, for any form of live to exist, condi

2、tions must be right. When the conditions aren rtight, that form of lives can extinct. To become extinct means to die out completely.Conditions must be right for life to exist. Millions of years ago, there were forms of lives that no longer exist. When condition changed, this form of life died out. O

3、ne extinction event happened about 250 million years ago. This is the largest extinction event of all time. Many forms of lives become extinct. 96% of all lives in the oceans died out. Most insects also became extinct. This event happened over a period of several million years. The causes of this ex

4、tinction event are still unknown. Possible causes include largest volcanic eruptions and global warming. Some scientists believe that there were several causes. They believe that a series of events caused the extinctions. Scientists are working for better understand what really happened.In modern ti

5、mes, we human beings face changing conditions. For humans to live, we need clean air and clean water. Pollution is now a growing problem around the world. Pollutionpoisons the air andwater that we depend on. Polluted air makes people sick and afraid to get outside. Polluted water poisons our food su

6、pply. As a result, we never know which foods are safe to eat. Human beings can be not live in a poisoned environment. Therefore, pollution is a major threat to our existence.Humans need temperature to be in a comfortable range. To be in a comfortable range means to be neither too hot nor too cold. W

7、ith global warming, global temperatures are rising. As global temperatures rise, the polar icecaps will melt. As the polar icecaps melt, ocean levels will rise. Areas of some countries will soon be under water. People would be forced to relocated from flooded areas.s goIn nature, even small changes

8、can sometimes have large effects. It s difficult to predict whathappen. The entire ecosystem that we depend on is changing. Some of these changings are irreversible. Irreversible changes cannot be undone. Let hsope the humans are smart enough to understand how the world is changing. With more unders

9、tanding, we make better choices about what to do. We c an face the challenge of the pollutions and global warming. We need to do this before it too late. This planet of earth is our only home and we need to protect it.Unit 3-1 vocabularyLizard 蜥蜴Mammals are covered by hair or fur, have a backbone an

10、d warm-blooded. All mammals produce milk for the young.Reptiles are covered by s, includes snakes, lizards and turtles . Reptiles have a backbone and are cold-blooded, which means they often rely on the external resources of heat.Birds are covered by feather and are warm blooded. Most of the birds c

11、an fly and many types of bird migrate great distances.Most insects such ants and bees have a small 3 parts body with 3 pairs of legs. Some insects, such as mosquitoes , spread diseases that cause the deaths of many humans.Unlike animals, plants get the energy that they need from the sun. Plants conv

12、ert light energy along with carbon and water into chemical energy.Scales and rulers are used to measure weight and length. Units of weight includes kilograms and pounds and units of length includes centimeters and inches.These instruments are used to observe very large and very small objects. Telesc

13、opes are used by astronomers and microscopes are used by biologists and doctors.These appliances are used in the kitchens of almost every home.Stoves are used to heat food andrefrigerators are used to keep foods cool or cold.House tools like these, are used to build or repair things.Hammers are used

14、 to pound in the nails andscrew drivers are used to turn a screw.Mammals include some of the most intelligent animals on earth, such as elephants and human beings. Mosquitoes cause the death of more human than any other animals.Rulers are used to measure lengthWe can use a telescope to see objects t

15、hat are far way.Unit 3-1 dialogueDo you know what date is it today?What do you mean, it s the special day?Oh, so you don t remember.Remember what? What s the special?It s our anniversary. We started dating a year ago today.Oh, really. Sorry.Just a minute, what do you think this is.Oh, it sneacklace

16、.Do you like it?Yes, I do. It s lovely. Especially the red heart. May I put it on?No, let me do it.So you did remember.Of course I remember. It s very special for both of us.I have something for you too.You do?Yes, but you have to wait until later.Oh, I can t wait. Tell me what is it.Can you guess w

17、hat it is?Could you give me a h?We went there 3 months ago.Oh, you mean Alfredo s.Yes, are you excited? You said you really like the food there.Yes, that s true. I also remembered the dessert. Do you?Yes, but let s not talk about that now. let s now view in the surprise.That restaurant looks nice.Ye

18、s, but it looks expensive.Let s go in and look at the menu.Wow, the menu looks great, especially the fish.Yes, it looks good but look at those prices.Let s try somewhere else.Sometime it s ok to spend a little money.Yes, but this price is a bit too high. Don t you think?Yes, they are a bit high. But

19、 donyou thinktit worth? Let s enjoy ourselves.Em, ok, if you put it that way. Let s see if we can take the table.I ve got you have a credit card.I sure hope the food is good.Stop worrying, let s just enjoy.Unit 3-2 ListeningQuick serve is a home repair company. It provides quick, reliable repair ser

20、vices to homes. Quick serve handles plumbing and electrical issues 24 hours a day. It also cleans the roofs, fixes internet connections and replaces broken windows. For a small fee, customers subscribe to the service. Its main customers are elders, which means older people. Whenever customers have p

21、roblems, they can call for help. There is also small charge for each service call.The company was established 5 years ago and is growing rapidly. It startedin 1 city but it sinn5owcites. The company plans to expand to 10 cities within the next 24 months. In each city, there is small central office i

22、n a low rent area of the city. The central office handles the businesses, advertising, payroll and billing. It also takes calls by customereither online or by telephone. It takes call 24 hours aday, 7 days a week.s quick a60% of the company s employees work from their homes. When a customer calls in

23、to the central office, a service employee is contacted it. The service employee then contacts customer and sets up an employment. These employees are highly trained and provide excellent services. In emergencies, such as a serious plumbing problem, service can be provided within an hour. One reason

24、for this is that the service employees live in different parts of the country. They are not central located so it easy for they to travel to customers home.Quick serve has an excellent reputation. Its prices are reasonable and it services are quick and efficient. The company s service employees are

25、clean, polite and efficient. In this type of business, person to person contact is the key to success. With each satisfied customer, more customers subscribe. Satisfied customers recommend quick serve to their friends. This kind of word-of-mouth advertising is very cost effective. Cost effect means

26、that the results are good without paying a high price. In other word, quality service provides its own rewards to the company.The company take great pride in being honest with the customers. There are no hidden charges for their services. As a result, the number of customers in each city is growing

27、rapidly. With the aging population, there are more elderly people who need home repair services. These people need to have confiden ce in the service provider. They don tcwhaenattetod.These people don t mind paying a reasonable fee for high quality service. High quality services should be rewarded.T

28、he company provides a range of service plans, each with a different subscription price. The least expensive service plan is called the basic plan. This plan provides non-emergency service with a very low service charge. The most expensive service pslan is their VIP plan. The VIP plan providesemergen

29、cy services 24 hours a day with no additional service charge. It also provides rebates for customers who don t call for any service during the year. In addition, quick serve gives bonus points to customers for each year they subscribe. These bonuses can be used to buy new appliances such as stoves a

30、nd refrigerators . If the business continues to grow, the owners may decide to take the company to public. This means that the public can buy shares of the company. It would then change from private-owned company to a public company. The owners believe that their business is successful and can expan

31、d around world. They also believe that taking their company public can make them rich.Unit 3-2 vocabularyBiology is study of life, including its structure and evolution. Biology study how life survives and reproduces.Chemistry is the study of matter, including the structure of its atoms and molecule

32、s. Chemists study how various substances interact with each other.Astronomy is one of the oldest sciences. Astronomers study the structure and evolution of the universe, including the study of stars, planets and galaxies.Geologies is the study of structure of history of the earth and other planets.

33、Geologist study different types of rocks, earthquakes and different layers of the earth.Mathematics is the study of numbers, shapes, patterns and change. Mathematics is used by all other branches of science.Here are some types of terrible events that hurt or kill people. Earthquakes are cause by for

34、ces deep within the earth. During earthquakes, many people are often killed by collapsing buildings and bridges. Flood happens when rivers rise and overflow their banks . Floodwaters damage or destroy many houses and businesses.Fires destroy building, land, and forests. There are many causes for fir

35、e, including lightning.In a hurricane, high winds destroy building and sometimes cause flooding. Some hurricanes have winds of more than 200 miles an hour.Car accident when car collide or drivers lose control of their cars. One of the main causes of car accidents is driving too fast.Unit 3-2 dialogu

36、eWhat s in that big box carried in?It s a new desk. I just brought and now I have to put it together.Do you need any help?No, I don t think so.I just need to get my tools. I need a screwdriver and maybe a hammer.Don t forget to read the instructions.How were things going?I ve almost finished.Somethi

37、ng doesn t look right to me. The right side is higher than the left side.Oh, you re rightI.t looks like I put a couple of screws into the wrong places.So now you have to take it apart.Great, and I thought I was almost finished.I told you to read the instructions. Did you read them?No, I didn t read

38、them. I hate to read the instructions. I looked at them but they were confusing.Well, this is what happen when you don t. You were to inpatient. Anyway, what can I do to help you?Could you get another screwdriver and help me in screw some of these screws?Ok, but next time please read the instruction

39、s.Do you ever look up at the sky and think about the lives in the universe?I did when I was a kid. But I don t do that very much anymore. Why do you ask? Sometimes I think I m lost in d-atoy-day details. Then I look up at the sky and see a big picture. I appreciate things more even the little things

40、.You sound that a philosopher or a poet. I felt like too when I was a kid.Don t you feel like that anymore?No, I don t. in fact, I try not to. When I think about thing too deeply, I get depressed. It s evenfrightening .Really, for me it s jusotptphoesite . Everything seems like a wonderful miracle .

41、 Doesn t that frighten you a bit? The univers e is so large and we are so small.What I realize is how little we understand. We just need to appreciate our life and not get lost.Sometimes being lost isnt so bYaodu. know the expression, ignorance is bliss .Sure, I ve heard it many times. To be ingoran

42、ce is to be happy.Maybe it s true. Maybe it s best not to think or know too much.Not, that s not for me. I want to understand as much as possible. That s why I became a scientist.Well, I respect your choice but it s not for me. If understanding is painful, I d rather not understand.Unit 3-3 Listenin

43、gHarry is on the business trip. Yesterday he was supposed to fly from San Francisco to Shanghai. However, things didn t turn out the way they are supposed to. In fact, nothing went the way it was supposed to. Everything went wrong and he didn gt et on his flight. As a result, he stayed in San Franci

44、sco. The following is summary what happen.Yesterday he got up at usual and had breakfast. Everything seemed to be fine and he was looking forward to the trip. He was just about to check out of his hotel when he felt the pain. It was a pain on his lower back. It was a dorm pain at first, not too bad.

45、 So he didn t worry about it and he checked out the hotel. Then he got on a shuttle bus to the airport. About half way to the airport, the pain in his back started to get worse. It was a growing pain and he was beginning to worry. Soon it was difficult for him to sit in his seat. The pain was gettin

46、g worse. He wanted to lie down. He started to swear and breathe quickly. He was in real pain then. As a scale of 1 to 10, the pain was an 8.When the bus got to the airport, the bus driver helped him to get off. It was difficult for him to walk but he finally made it to the terminal. Inside the termi

47、nal, he went tothe men s bathroom.He went tothe toilet but that didn t help. Instead of improving, his felt dizzy and therew up . By now, he was wet from all his sweating. He knew he couldn gt et on his flight. He used his phone to call airline. He explained the situation and cancelled his reservati

48、on. Then he called 911 for an emergency help. 911 is the emergency number to call for help in the United States.An ambulance arrived about 10 minutes after he called. By then, he was in so much pain that he could barely walk. Once inside the ambulance, they gave him oxygen to help him to breathe. Bu

49、t the pain was still terrible. Then they drove to a hospital near the airport. Luckily, the hospital was on his health plan. That means his health insurance is supposed to pay for everything. Medical costs in the United States are very high. When he arrived to the hospital, he was taken to the emerg

50、ency room. After some tests, a doctor told him he had a kidney stone. It was a very small stone, but it caused a lot of pain. It was passing through a small tube in his body from his kidney to his bladder. The pain will go away once it got to his bladder. Until then he had to get pain medicine to re

51、duce the pain. Harry didn have to stay in hospital for very long. With the pain medicine, the pain went away very quickly. He took a taxi back to his hotel and checked in for another night. Then he called the airline and made a reservation for another flight. The flight will leave tomorrow. Until th

52、en, he will just rest in his hotel.There may be a good movie to watch. So when you re traveling, please prepare for the emergencies.Make sure you had a medical insurance. You never know when something like this can happen to you.So be prepared.Unit 3-3 vocabularySolar energy is one of the cleanest a

53、nd mostplentiful sources of energy. Solar power depends onsunlight, so in cloudy weather or at night, no power generated.Wind energy is non- polluting but it s only useful in places where theisrea lot of wind. Windy turbinesconvert the kinetic energy by wind into a mechanical power.Nuclear energy is

54、 efficient and doesn t produce carbon gases as waste products. The dangerous ofnuclear power included deadly radioactive waste products.A major source of energy comes from the burning offossil fuels such as coal and oil. When we burnthe fossil fuels, waste gases such as CO2 are produced. Fossil fuss

55、 remain the large sources of energy from most counties.Hydro power comes the kinetic energy of falling water. Output is reliable and can be regularly to meet the demand except during the period of drought.Here are different types of words in English. Words that are nouns and pronouns are used to rep

56、resent objects. A noun or a pronoun can be a person, an animal or a thing including an idea.Verbs are used to express action such as to sit down or stand up. We also use verbs to express relationships such as to love someone or to own something.We use adjective to describe objects such as a tall bui

57、lding. Adjective are used with noun or pronoun but not used with verbs.We use adverb to describe actions such as to run fast or to walk slowly. Adverbs express thequality ofan action such as how well or poorly something is gone.We use conjunctions to connect things or actions such as to read and wri

58、te. Conjunctions include words such as and, or, because, but and yet.Dams are expensive to build and affect wildlife such as fish.Unit 3-3 dialogueHey, I ve got some news, some good news and some bad news.Ok, give me the bad news first.We were moving to a new office.When was this going to happen?We were supposed to move at the end of next month.How far away is the new office?We are not sure yet but we will mean a longer comm