1、懂你英语Level3 Unit 3Unit 3-1 Listening 自然灾害和环境保护There are many forms of lives on earth, including human beings. Life exists in a variety of conditions. Some forms of lives live in the watery environment, like the oceans. Other forms of lives can be found in very dry areas like desserts. However, for an
2、y form of live to exist, conditions 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
3、, this form of life died out. 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 milli
4、on years. The causes of this 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 wh
5、at really happened. In modern 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.
6、Polluted water poisons our food 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
7、 be neither too hot nor too 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
8、. In nature, even small changes 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 h
9、ow the world is changing. With 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 vocabulary 动物和工具Lizard 蜥蜴Mamma
10、ls are covered by hair or fur, have 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
11、 feather and are warm blooded. Most 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
12、the energy that they need from the 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
13、 to observe very large and very small 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 t
14、hese, are used to build or repair 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 us
15、ed to measure lengthWe can use a telescope to see objects that are far way. Unit 3-1 dialogue 纪念日Do 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. Sor
16、ry. Just a minute, what do you think this 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 wa
17、it until later. Oh, I cant wait. Tell 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 th
18、at now. lets now view in the surprise. 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 thi
19、s price is a bit too high. Dont you think?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 Listening 快速
20、服务维修公司Quick serve is a home repair company. It 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.
21、Its main customers are elders, which means older 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 expan
22、d to 10 cities within the next 24 months. In each 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 wee
23、k. 60% of the companys employees work from their 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
24、 a serious plumbing problem, service can be provided 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
25、are reasonable and it services are quick and efficient. 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
26、 friends. This kind of word-of-mouth advertising 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 hidd
27、en charges for their services. As a result, the 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
28、 paying a reasonable fee for high quality service. 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 se
29、rvice charge. The most expensive services plan 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
30、for each year they subscribe. These bonuses can 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 co
31、mpany to a public company. The owners believe that their business is successful and can expand around world. They also believe that taking their company public can make them rich. Unit 3-2 vocabulary 学科和自然灾害Biology is study of life, including its structure and evolution. Biology study how life survi
32、ves and reproduces. Chemistry is the study of matter, including 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 structure 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 o
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