1、Unit 3-1 ListeningThere are many forms of lives on earth, including human beings. Life exists in a 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, con
2、ditions must be right. When the conditions arent right, 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
3、. One 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
4、 extinction 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 moder
5、n times, 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. Pollution poisons the air and water that we depend on. Polluted air makes people sick and afraid to get outside. Polluted water poisons our f
6、ood supply. 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
7、cold. With 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. In nature, even small chan
8、ges can sometimes have large effects. Its difficult to predict whats going to happen. The entire ecosystem that we depend on is changing. Some of these changings are irreversible. Irreversible changes cannot be undone. Lets hope the humans are smart enough to understand how the world is changing. Wi
9、th more understanding, we make better choices about what to do. We can face the challenge of the pollutions and global warming. We need to do this before its 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, hav
10、e a backbone and 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. Mos
11、t of the birds can 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
12、 sun. Plants convert 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 sm
13、all objects. Telescopes 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 and refrigerators are used to keep foods cool or cold. House tools like these, are used to build or repair
14、things. Hammers are used to pound in the nails and screw 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 t
15、elescope to see objects that are far way. Unit 3-1 dialogueDo you know what date is it today?What do you mean, its the special day?Oh, so you dont remember. Remember what? Whats the special?Its our anniversary. We started dating a year ago today. Oh, really. Sorry. Just a minute, what do you think t
16、his is. Oh, its a necklace. Do you like it?Yes, I do. Its lovely. Especially the red heart. May I put it on?No, let me do it. So you did remember. Of course I remember. Its very special for both of us. I have something for you too. You do?Yes, but you have to wait until later. Oh, I cant wait. Tell
17、me what is it. Can you guess what it is?Could you give me a h?We went there 3 months ago. Oh, you mean Alfredos. Yes, are you excited? You said you really like the food there. Yes, thats true. I also remembered the dessert. Do you?Yes, but lets not talk about that now. lets now view in the surprise.
18、 That restaurant looks nice. Yes, but it looks expensive. Lets go in and look at the menu. Wow, the menu looks great, especially the fish. Yes, it looks good but look at those prices. Lets try somewhere else. Sometime its ok to spend a little money. Yes, but this price is a bit too high. Dont you th
19、ink?Yes, they are a bit high. But dont you think it worth? Lets enjoy ourselves. Em, ok, if you put it that way. Lets see if we can take the table. Ive got you have a credit card. I sure hope the food is good. Stop worrying, lets just enjoy.Unit 3-2 ListeningQuick serve is a home repair company. It
20、provides quick, reliable repair services 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 olde
21、r people. Whenever customers have problems, 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 started in 1 city but its now in 5 cites. The company plans to expand to 10 cities within the next 24 months. In ea
22、ch city, there is small central office in a low rent area of the city. The central office handles the businesses, advertising, payroll and billing. It also takes calls by customer either online or by telephone. It takes call 24 hours a day, 7 days a week. 60% of the companys employees work from thei
23、r homes. When a customer calls into 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 pro
24、vided within an hour. One reason for this is that the service employees live in different parts of the country. They are not central located so its quick and easy for they to travel to customers home. Quick serve has an excellent reputation. Its prices are reasonable and it services are quick and ef
25、ficient. The companys service employees are 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 advertisin
26、g is very cost effective. Cost effect means 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
27、 number of customers in each city is growing rapidly. With the aging population, there are more elderly people who need home repair services. These people need to have confidence in the service provider. They dont want to cheated. These people dont mind paying a reasonable fee for high quality servi
28、ce. High quality services should be rewarded. The 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 services plan
29、is their VIP plan. The VIP plan provides emergency services 24 hours a day with no additional service charge. It also provides rebates for customers who dont call for any service during the year. In addition, quick serve gives bonus points to customers for each year they subscribe. These bonuses can
30、 be used to buy new appliances such as stoves and 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 t
31、hat their business is successful and can expand 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, i
32、ncluding the structure of its atoms and molecules. 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 stru
33、cture of history of the earth and other planets. 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 tha
34、t hurt or kill people. Earthquakes are cause by forces 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 buildin
35、g, land, and forests. There are many causes for fire, 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
36、of car accidents is driving too fast. Unit 3-2 dialogueWhats in that big box carried in?Its a new desk. I just brought and now I have to put it together. Do you need any help?No, I dont think so.I just need to get my tools. I need a screwdriver and maybe a hammer. Dont forget to read the instruction
37、s. How were things going?Ive almost finished. Something doesnt look right to me. The right side is higher than the left side. Oh, youre right. It 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 rea
38、d the instructions. Did you read them?No, I didnt read them. I hate to read the instructions. I looked at them but they were confusing. Well, this is what happen when you dont. You were to inpatient. Anyway, what can I do to help you?Could you get another screwdriver and help me in screw some of the
39、se screws?Ok, but next time please read the instructions. 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 dont do that very much anymore. Why do you ask?Sometimes I think Im lost in day-to-day details. Then I look up at the sky and see a big pic
40、ture. I appreciate things more even the little things. You sound that a philosopher or a poet. I felt like too when I was a kid. Dont you feel like that anymore?No, I dont. in fact, I try not to. When I think about thing too deeply, I get depressed. Its even a bit frightening. Really, for me its jus
41、t the opposite. Everything seems like a wonderful miracle. Doesnt that frighten you a bit? The universe 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 bad. You know the expression, ignora
42、nce is bliss. Sure, Ive heard it many times. To be ignorance is to be happy. Maybe its true. Maybe its best not to think or know too much. Not, thats not for me. I want to understand as much as possible. Thats why I became a scientist. Well, I respect your choice but its not for me. If understanding
43、 is painful, Id rather not understand. Unit 3-3 ListeningHarry is on the business trip. Yesterday he was supposed to fly from San Francisco to Shanghai. However, things didnt turn out the way they are supposed to. In fact, nothing went the way it was supposed to. Everything went wrong and he didnt g
44、et on his flight. As a result, he stayed in San Francisco. 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 hi
45、s lower back. It was a dorm pain at first, not too bad. So he didnt 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 dif
46、ficult for him to sit in his seat. The pain was getting 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 b
47、ut he finally made it to the terminal. Inside the terminal, he went to the mens bathroom. He went to the toilet but that didnt help. Instead of improving, his felt dizzy and he threw up. By now, he was wet from all his sweating. He knew he couldnt get on his flight. He used his phone to call airline
48、. He explained the situation and cancelled his reservation. 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 a
49、mbulance, they gave him oxygen to help him to breathe. But 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 emergency 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
