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Step2: Learn the new words and expressions 1. crispy adj. 脆的;酥脆的 2. sour adj. 酸的;有酸味的 3. by mistake 錯(cuò)誤地;無(wú)意中 4. customer n. 顧客;客戶(hù) Step3: The words in the box describe how food can taste. Write them under the correct pictures. Some pictures have more than one word. On PPT7 Step4: Write the name of a different food after each word. sweet_banana_ crispy_______ salty_________ sour________ Step 5: Listen and circle T for true or F for false. 1. Potato chips were invented by mistake. T F 2. They were invented in 1863. T F 3. The customer thought the potatoes were not thin enough. T F 4. The customer said they were not salty enough. T F 5. G