Unit 9 Section A Warming up light bulb When were they invented? watch microwave oven alarm clock Listening (1b: P68) 1876年 1885年 1927年 1971年 1976年 Sample dialogues: A: When was the telephone invented? B: I think it was invented in 1876. A: When was the car invented? B: I think it was invented in 1930. I think it was invented after the telephone. Pairwork (1c:P68) C: I dont think so. I think it was invented in 1873, so it was invented before the telephone. D: I dont agree. I think it was invente
