Unit 9When was it invented?Section BA: Who was the _______ invented by?B: It was invented by ______.A: Who was the _______ invented by?B: It was invented by ______.Carl BenzRevisionRevisioncarA: When was the _______ invented?B: I think it was invented in ______.A: When was the _______ invented?B: I think it was invented in ______.197619711927A: What is the _______ used for?B: It is used for _______________.A: What is the _______ used for?B: It is used for _______________.talking with peopletelephoneWho invented potato chips?How do the food taste?soursoursweetsweetsweetsweetsweetsweetcrispycrispysaltysaltyListen to the history of potato chips and circle “T” (for true) or “F” (for false).1.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.2aTFFFFFFTTTTT that potato chips were invented by mistake? Potato 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 knowwere invented1853were crispyreally saltyListen again, complete the sentences.2bThe history of potato chipsPAIRWORK A: Did you know potato chips were invented by mistake?B: Wow, I didn’t know that. Who invented them?A: …2cDiscuss • What causes inconvenience ( 不便 ) to you?• How to change it?• Can you invent something to change it?Read the history of tea.Who invented tea? Did you know that tea, the most popular drink in the world (after water), was invented by accident? Although tea wasn’t brought to the Western world until 1610, ...
