2. A dangerous servant 8B Unit 3 Xu Dan Shaochang School

3. If you are thirsty, what will you do? If you are hungry, what will you do? Food and water give us power. If we don’t have food or water, we won’t work well. Our energy comes from food and water. energy (n.) : power that make things work. Energy,such as food and water, makes us energetic. energy 能源，能量 energetic 精力充沛的

4. I’m a boy. My energy comes from food. I’m a boy. My energy comes from food. I’m a robot. My energy comes from electricity. I’m a robot. My energy comes from electricity. 电，电能 What else must use electricity ?

5. fridge vacuum cleaner printerheater hotplate torch portable CD player iron electrical appliances

6. electricity electric natural energy. use electricity to work 用电的 be related to electricity 与电有关的 electronic 电子的

7. electric kettle kettle boil water by electricity : boil water on a stove. toothbrush: brush teeth by hand. electric toothbrush brush teeth by electricity

8. Can electricity be seen ? No, it cannot be seen. It’s invisible. adj. invisible 看不见的 visible 看得见的 Electricity is a kind of i_______ e________.nvisiblenergy We can change electricity into different kinds of energy that we can see, hear or feel.

9. Do you know these things? What do they use electricity to do? a bulba microwave a fana music player light heat foodcool the airplay music What forms of energy can they change electricity into? S1:What forms of energy can … change electricity into? S2: … can change … into …energy.

10. Match the kinds of energy in the box with the things in the pictures. Some things may have more than one kind of energy. The first one has been done for you.

11. 1____________ 2____________ 3____________ 4____________ 5____________ 6____________ 7____________ 8____________

12. Portable CD players can change electricity into sound energy. Telephones can change electricity into sound energy. Hotplates can change electricity into heat energy. TV sets can change electricity into light and sound energy. Torches can change electricity into light energy. Vacuume cleaners can change electricity into moving and sound energy. Fans can change electricity into moving energy. Irons can change electricity into heat energy. Electricity is a good servant. Electricity serves us well. Electricity provides us with good services. serve ----- service ----- servant v. 服务 n. 服务 n. 仆人 change…into… energy

13. a bulb wire flow cable connect streets buried power station meter measure ￥ 85.00 bill monthly

14. 1. ________ something that carries electricity 2. ________ a piece of paper that shows how much you have to pay 3. ________ the glass part of an electric lamp that gives light 4. ________ how much there is of something 5. ________ put something in the ground 6. ________ a machine that tells you the amount you used 7. ________ thick rope of wire which electricity passes though 8. ________ join together 9. ________ shape or kind 10. ________ find the amount, size, weight, etc. of something 11. ________ done or happening every month wire bill bulb amount bury meter cable connect form measure monthly

15. 1.It goes into the thin wires which are joined to the meter. 2.Electricity comes from a power station. 3.It goes into the cables that are buried under the street. The cables are connected to the meter in our flat. 4.It comes into our flats. How can electricity come to our flat?

16. 1 1 2 3 4 5 2 3 45 1 2 3 45 1 1 2 3 4 5 23 45 1 23 45 1 1 2 3 2 3 1 2 3 1 1 2 2 1 2

17. 1. energy 2. wire 3. meter 4. measure 5. bill 6. monthly 7. bulb 8. cable 9. power station 10. electricity——electrical —— electric——electronic 11. invisible / visible 12. servant —— serve ——service 13. connect to / be connected to 14. bury / be buried 15.iron / an iron / iron clothes

18. 1. A meter measures the amount you use. 2. You get a bill for it monthly. 3. Nobody ‘s seen electricity. It’s invisible. 4. Light! The light in a light bulb. 5. We call the thick wires cables. 6. What are they connected to? 7. Cables are buried under the street. 8. Electricity is a good servant.

19. 1. 账单 __________________ 2. 电灯泡 __________________ 3. 熨斗 __________________ 4. 发电站 __________________ 5. 计量表 __________________ bill bulb iron power station meter bill _______ meter _______ power station _______ iron _______ bulb _______ 账单 计量表 发电站 熨斗 电灯泡

20. a. cann’t be seen b. something that carries electricity c. once a month d. put something in the ground e. thick wires 1. cable 2.invisible 3.bury 4. monthly 5.wire 1.__________ cann’t be seen 2.__________ something that carries electricity 3.__________ once a month 4.__________ put something in the ground 5. _________ thick wires invisible wire monthly bury cable

21. 1.measure the amount _________________ 2. servant ____________ serve ____________ service ____________ 3. change…into forms of energy ___________ 4. get a bill for electricity monthly _____________________________ 计量数量 n. 仆人 v. 服务 n. 服务 转换成能的形式 每月收到电费账单

22. 1.His ambition is to be a (an) ___________engineer. (electricity) 2.In the university, students may use _____________ calculators in Maths exams. (electricity) 3. The _______________ was cut off when we didn’t pay the bill. (electric) 4. With the development of science, we can use __________ toothbrush to brush teeth. (electricity) electric electronic electricity electric electrical 6. Young people usually have more ________ than the old. (energetic) energy 5. Please ask an electrician to repair the _____________ appliances. Don’t do it by yourself. (electricity)

23. 1. We can ask a ____________ to help with the housework. (serve) 2. Jack’s mother ______________ (serve) the rich family for 15 years. 4. That hotel offers good ____________ to customers. (servant) 3. Taxi ___________ is developing quickly in Shanghai. (serve) servant has served service

24. 1.She always pays her __________on time. (bill) 2.Many families pay the bill for telephones ___________. (month) 3.There’s thunder and __________ (light). It’s going to rain. 4.It was so cloudy that the top of the mountain was __________ (visible) bills monthly lightning invisible

25. 1.This road is ____________ to the airport. (connect) 2.Mr Brown gets his pay from his boss ____________. (month) 3. Modern Family is a popular ____________ magazine. (month) 4.The fog became thinner. The ships became __________. (invisible) connected monthly visible

26. ( ) 1.You get a bill ________ water, gas, electricity every month. A. for B. on C. with D. about ( ) 2.Water changes _________ ice when it is very cold. A. into B. in C. for D. to

27. 1.You get a bill for it monthly. ( 划线提问 ) __________ __________ do you get a bill for it? 2.I visit my grandparents twice a month. ( 划线提问 ) How __________ __________ do you visit your grandparents? 3. Where does electricity come from? Do you know? （合并为一句） Do you know __________ electricity ___________ from? How often many times where comes

28. 1.We connected these thin wires to cables under the street. （改为被动语态） These thin wires ___________ ____________ to cables under the street. 2. We call the thick wires cables. ( 改为被动语态 ) The thick wires __________ __________ cables by us. 3. The old man bury the gold under the tree. ( 改为被动语态 ) The gold __________ __________ under the tree. are connected are called is buried

29. sound energy What kind of energy can they produce? Recorders can produce sound energy.

30. sound energy What kind of energy can they produce? Recorders can produce sound energy. heat energy Irons can produce heat energy.

31. sound energy What kind of energy can they produce? Recorders can produce sound energy. heat energy Irons can produce heat energy. light energy Lights can produce light energy.

32. sound energy What kind of energy can they produce? Recorders can produce sound energy. heat energy Irons can produce heat energy. light energy Lights can produce light energy. moving energy Fans can produce moving energy.

33. Electricity is a kind of strong power, it flows through w________. It is i__________, but we can change it into forms of e__________that we can s__________ and feel. We can also c____________it into energy that can move things. It is very useful, it is our good s___________. ires nvisiblenergy eehange ervant

34. wire metre street cable Power station measure flow come into connect buried