2. Unit 16 Scientists at work  What are the subjects we study in school? chinese mathematics English history geography politics physics chemistry biology computer and physical education  What are names of the school subjects in which you study science? physics chemistry and biology  Which subject do you like best?  Which teacher do you like best?  Describe the four pictures in the textbook.

3. Difficult expressions safety instructions for the lab experiments any accidents follow your teacher ’ s instructions tie it up wave some air in your direction be careful about the frame clear everything away neat and clean

4. The British Museum a famous library opened daily it is closed Good Friday natural disasters Natural History Museum Earthquake Experience our planet roar of a dinosaur the first aeroplanes American space capsule the first flight around the moon

5. Language points of speaking part in my opinion a waste of money in the future make use of the first city to build A maglev train be bad for one’s health 我认为 浪费钱 在将来 利用 第一个建立磁力悬浮列车的城市 对健康有害

6. take spend cost pay It take sb some time to do sth spend some time in doing sth on +n. sth cost sb some money pay sb some money for sth

7. much too=too too much =much It is ____ expensive. He drank_____beer. This factory causes_____pollution. You are ______ kind to me. much too+adj/adv too much+Un

8. as when as while as and like because since as for so as same such

9. Make up a dialogue to discuss the advantages and disadvantages of computers.

10. Language points of reading  做实验  描述实验  许多实验  用风筝吸引闪电  做我的实验  靠近钥匙  等待坏天气 conduct experiments describe experiments a number of experiments use a kite to attract lighting do my experiments close to the key wait for bad weather

11.  存储大量电  丝绸做的风筝  防止你触电  从云层引下电来  变的带电  被雨淋湿  导电 store a great deal of electricity a kite made of silk protect you from the electricity pull the electricity from the cloud become charged be wet from the rain conduct electricity

12. Guess the meaning of the following phrases  tie sth to sth  add sth to sth  point sth to sth  fasten sth to sth

13. Can you translate the following sentences?  1.Watching TV, he was doing his homework.  2. Having finished the homework, he began to watch TV. What are the differences between the two structures?

14. How to use the word “ begin ” ? 1. It began to rain. 2. Are the farmers beginning to sell apples? 3. She began to understand she was wrong. 1 主语指物 2 谓语本身使用进行时态 3 宾语是表示心理状态的词汇，例如： understand,see, know.think,realize 等。 begin to do=begin doing

15. Study the following two sentences.  1.Work harder and you will find it not difficult to learn.  2. Hurry up, or you will be late. 祈使句 +and+ 将来时 祈使句 +or+ 将来时

16. be made of /from/up of/into/in 1. The bridge ______ steel. 2. Paper _______wood. 3. This kind of machine________China 4. This class ________ 50 students. 5. Glass can _______ bottles..

17. high and highly The plane flew _____above. They climbed ________. He thought ______ of the boy’s behaviour. _____pleased _______interesting

18.  Aim  Materials  Instructions  Description  Results To show that lighting and electricity are the same. A kite, a very sharp piece of metal,a silk ribbon, a key, a condenser, a small shed, a thunderstorm with lighting. Paragraph 5 and 6. Paragraph 3 The electricity stored in the condenser can be used to do other experiments which proves that lightning and electricity are the same.

19. 1.We cannot go and look for lighting,so Franklin has to find a way to make lighting come to him, 2. A kite made of paper won’t last long in rainy weather 3. A silk kite doesn’t attract lighting 4. He had to direct the electricity towards the condenser. 5. He had to collect and store the electricity. 6. He had to make sure that he himself would not be hit by the lighting 7. He had to stop the kite from flying away, without touching the string that would be charged with electricity