【正文】
______ ______ by Edison. 3. What is it ______ for ? It is used for ____ people _____ in the dark. 情境引入 The keys: 。 invented。 invented。 invented. 。 see . 情境引入 car 1885 Benz. Practice: When was the car invented ? It was invented in 1885. Who was it invented by ? It was invented by Benz. What’s it used for ? It’s used for traveling. A : What is the puter used for ? B :It is used for studying What is the calculator used for ? It is used for calculating . 情境引入 Bell 1876 Beld 1927 Kelif 1976 1971 情境引入