根据对话内容,从方框内选择合适的句子补全对话。(有两项多余) | |
B: (1)_________ A: When was it invented? B: (2)_________ A: How did it work? B: (3)_________ They pushed the pedals (踏板) down hard with their feet. (4)_________ A: What was it made of? B: It was made of wood. (5)_________ A: Yes, I never saw such a machine before. |