Unit4 words 课件 2022-2023学年沪教牛津版（广州沈阳通用）八年级英语上册

abacus advertisement 指南针 Do you know the Four Great Inventions in ancient China? compass I. Warming up 造纸术 Four Great Inventions papermaking 火药 Four Great Inventions gunpowder 印刷术 Four Great Inventions printing Four New Chinese Inventions High speed railway Mobile payment Online shopping Bike sharing telephone mobile phone Look and say letter In the past, people had to write letters to keep in touch with each other, that will take a long time. Now it is easy for people make phone calls. After the invention of telephone, life became more convenient. It allows people to keep in touch with e ach other anytime, anywhere. lamp desk lamp candle light bulb Life was difficult in the past, because they can not see at night. They had to use oil lamps or gas lamps. With the light bulb, people can do as many things as they can in the daytime. wheel carriage passenger Without the wheel, people had to walk to others rooms, that is tired and it take a long time. With the wheel, peo