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Ask Ss the questions:
A: What are they called? B : They are called…
A: How do they taste? B : They taste…
And write the names of the food after the taste.Step 3Activity 1c.
Listen and circle T or F.Step 4Listen again and answer some questions.Step 5Activity 1d.
Listen again and then complete the sentences.Step 6Pair works.
Let Ss make conversations about the invention of potato chips.
E.g.:
A: Did you know potato chips were invented by mistake?
B: Wow, I didn’t know that. Who invented them?
A: ... Step 7Brainstorm.
Introduce to Ss how some food was invented, like sandwich.Step 8Summary.
Review the new words and key phrases.
What have you learned from the class?
----“Small inventions changed the world by accident”.Step 9Talk about the junk food.
Hopefully students eat less junk food , it tastes nice , though.Step 10Homework:
Write an article about the history of one invention.