1、懂你英语Level3Unit3Unit 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 ofconditions. 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 any f
2、orm of live to exist, conditions 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, th
3、is form of life died out. One extinctionevent 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 insectsalso became extinct. This event happened over a period of several million year
4、s. The causes of this extinction event are still unknown. Possible causes include largest volcaniceruptions 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
5、 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. Polluted w
6、ater 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 be neither
7、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.In nature,
8、even small changes can sometimes have large effects. It s difficult to predictwhat s going to happen. The entire ecosystem that we depend on is changing. Some ofthese changings are irreversible. Irreversible changes cannot be undone. Let s hope thehumans are smart enough to understand how the world
9、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 it s 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Mammals are covere
10、d 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 feather and a
11、re 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 the energy tha
12、t they need from the sun. Plants convert lightenergy 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
13、large and very small objects. Telescopes areused 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 heatfood and refrigerators are used to keep foods cool or cold.House tools like these, are used to bui
14、ld 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 used to measure lengthWe
15、 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, 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, wha
16、t do you think this is.Oh, it sneacklace .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
17、 wait. Tell me what is it.Can you guess what it is?Could you give me a h?We went there 3 months ago.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 restau
18、rant looks nice.Yes, 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 a
19、re a bit high. But don t you think it 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 Listening 快速服务维修公司Quick serve is a home repair company. It provi
20、des 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 older peop
21、le. 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 it s noiwn 5 cites. The company plans to expand to 10 cities within the next 24 months. In each city
22、, 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 customereither online or by telephone. It takes call 24 hours a day, 7 days a week.60% of the company s employees work from their homes.
23、 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 provided wi
24、thin an hour. One reason for this is that the service employees live in different parts of the country. They are not central located so it s quick and easy for they to travel tocustomers home.Quick serve has an excellent reputation. Its prices are reasonable and it services are quick and efficient.
25、The company s 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 advertising is ver
26、y 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 number o
27、f 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 don t wantto cheated.These people don t mind paying a reasonable fee for high quality service. High
28、qual ityservices 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. T he most expensive service s planis their V
29、IP plan. The VIP plan provides emergency services 24 hours a day with no additional service charge. It also provides rebates for customers who don t call for anyservice during the year. In addition, quick serve gives bonus points to customers for eachyear they subscribe. These bonuses can be used to
30、 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 that their
31、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 survivesand reproduces.Chemistry is the study of matter, includ
32、ing 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 ofthe 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
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