2. Section A self check 1 发明 v. 2 发明 n. 3 发明家 4 可调节鞋跟的鞋 5 电池供电的拖鞋 6 可加热的冰淇凌勺 7 在黑暗里 8 改变鞋子的风格样式 9 电动玩具 10 最有帮助的发明 11 最令人讨厌的发明 12 电灯泡 13 微波炉 14 被用来做 … 15 在一个孤岛上

3. Section A self check 1 发明 v. 2 发明 n. 3 发明家 4 可调节鞋跟的鞋 5 电池供电的拖鞋 6 可加热的冰淇凌勺 7 在黑暗里 8 改变鞋子的风格样式 9 一个电动玩具 invent invention inventor shoes with adjustable heels battery-operated slippers heated ice cream scoop in the dark change the style of the shoes an electric toy

4. Section A self check 10 最有帮助的发明 11 最令人讨厌的发明 12 电灯泡 13 微波炉 14 被用来做 … 15 在一个孤岛上 the most helpful invention the most annoying invention the light bulb microwave oven be used for… on a tiny island

5. A: What is this? B: It is a ___________. A: ________ it _________? B: It________________1876. A: _________ it _________? B: It _____________ Bell. A: ________ it _________? B: It ______________ talking with people. telephone When was invented was invented in Who was invented by was invented by What is used for is used for

6. We have inventions e__________. Inventions make us live e______ and h______. W__________ inventions our lives will be d_________ and less p_________. Unit 9 When was it invented? easily everywhere happily Without difficultpleasant

7. _______is / are widely used in our daily life. If there were not any ______, we couldn’t … we might … … we could … …

8. my son my father my husband my mother In England Galileo Keep food fresh in 1976 Miss Xia’s son’s favorite invention is …. It was / is …. telescope fridge

9. It was invented in 1927. It was invented in America. It was invented by John Logie Baird. It is used for watching something interesting killing time relaxing myself knowing something happening now … a coach potato

10. M: Stop watching TV! You'll be a couch potato! X: I just want to be an actor! A: Are you serious? B: I know it's no bed of roses, but I'll try. 轻松容易的事情、生活 老看电视不运动的人 What does “a coach potato” mean? Read and guess!

11. small potato 小人物, 微不足道的人 hot potato 难对付的人 the clean potato 最适当的事物，正派的人 potato-head 傻瓜 potato digger 古板守旧、不受欢迎的人 couch potato 吃饱饭后成天窝在沙发上看电视的人 mouse potato 整天坐在电脑前的电脑迷 What kind of potato are you? As food, how does potato taste?

12. crispy and salty potato chips lemon sour ice cream sweet What else tastes crispy/salty/ sour / sweet? Different foods have different tastes, so they taste different. What do you like eating for snacks? Do you know the history of potato chips? tea bitter

13. Some inventions were invented by mistake and some inventions were invented by accident. What about the potato chips? a chef called George Grum He is easy to get angry / unhappy. He is easy to be in a bad mood.

14. 2a.Listen and circle “T” (for true) or “F” (for false). 1.The potato chips were invented by mistake. 2.They were invented in 1863. 3.The customer thought the potatoes weren’t thin enough. 4.The customer said they weren’t salty enough. 5.George wanted to make the customer happy. 6.The customer was happy in the end. T F 1853 salt - salty make sb + adj. at last ; finally

15. The history of chips 2b: The history of chips that potato chips were invented by mistake? Chips by a chef called George Crum. They were invented in.George Crum cooked them for a long time until they. And he sprinkled lots of salt on them so they were. Did you know were invented 1853 were crispy really salty

16. a chef called George Grum a customer---sent back a plate of fried potatoes George Grum—was in a bad mood cut the potatoes thin---cooked long time---sprinkled salt on them The story of chips The story of chips Did you know that potato chips were invented by mistake? Today let me tell you the interesting story about the history of potato chips. Long long ago, there was a chef …

17. A: Look! What are they called in English? B: They are called … … A: What are they made of? B: Of course they are made of … …. A: When were they invented? Do you know? B: They were invented in … …. A: Who were they invented by? B: They were invented by … …. A: How were they invented? B: They were invented … …? A: What are they used for? B: They are used for … …. A: Do you like potato chips? B: Yes. I like them very much. A: Why do you like them so much? B: Because they taste … …. I like this kind of food. A: Really. Could I have some to taste? B: Sure. Let’s go.

18. The history of chips How were the potato chips invented by mistake? One day a customer in the restaurant _____ George worked ____ ____ his plate of fried potatoes because he said they ___ ____ too thick. At that time,George was in a ___ mood, so he cut the potatoes really, really thin, and he cooked them for a ____ time until they were _____. And he sprinkled ___ ___ salt on them so they were really ____. He thought the customer would hate them. But the customer loved them and asked for ___. Since then, everyone like to order this kind of _____, ____, ____ potato chips. where sent back were cut bad long crispy lots of salty more thinly-sliced crispy salty

19. Revise 2a,2b by filling in the blanks with the right words. Potato chips were invented by _______. They were invented by a ______ ______ George Crum in 1853. One day a customer in the restaurant where George worked ______ ______ his plate of fried potatoes because he said they were ______ too thick. George was in a ______ ______, so he ______ the potatoes really ______, and he _______ them for a long time until they were ______. And he ________ lots of salt _____ them so they were really ______. He thought the customer would hate him. But the customer ______ them and _____ _____ more. He ______ the other customers ______ them, and soon everyone was ordering thinly-sliced, crispy, salty potato chips. mistake chef called sent back cutbad moodcutthin cookedcrispy sprinkledon salty lovedasked for toldabout

20. When were they invented? the abacus in the sixth century the umbrella about 4000 years ago the binoculars in 1854 the camera in 1827 the bicycle in 1880s Self Check (2:P73)

21. The abacus was invented in the sixth century by Chinese people. abacus

22. The umbrella was invented about 4000 years ago in Assyria, China and Egypt.

23. In Italy in 1854, Ignatio Porro invented the binoculars.

24. The Camera was invented by Joseph Nicephore Niepce in 1827 who took the first picture.

25. The bicycle was invented in the 1880s in England.

27. crispy sweet salty sour 1.I don’t like eating chocolate. It tastes too __________. 2.Mom added salt but it sill wasn’t _________ enough. 3. I prefer lemons to oranges. I like the _____ taste. 4.She likes______ cookies. They are hard, dry and easily broken. sweet salty sour crispy

28. A: Look! This looks so interesting! B: Ah, it’s a great invention of China. A: Really? When ______ it ___________? B: I think it ______ ___________ in Han Dynasty. A: What ______ it ________ for at that time? B: Guess! A: ______ it _______ for holding water? B: No. It _____ _______ for testing earthquakes. A: Wow, it’s really amazing! _____ it still ______ for testing earthquakes nowadays? B: No, no. It _____ _______ for watching. was invented wasinvented wasused was used was used Isused isused Make up a conversation in pairs according to the picture and the dialogue.