根据短文内容及首字母提示，填写所缺单词，使短文意思完整。每空限填一词。Think about how you use artificial (人造的) light every day. In the morning, a light on your clock shows the time. When you use your computer, television, and a phone, their screens light up. Traffic lights tell you w 【小题1】 to stop and go when you drive. You turn on lights in your car and in your house at night. These are just some of the w【小题2】 you use artificial light. Now think a 【小题3】 living without artificial light. How different would your life be?
In the past, people use fire for light at night. Then from 3,000 BC, people started using candles. After that lamps (灯) were i 【小题4】, people used oil and gas to light the lamps. Finally, in 1879, Thomas Edison invented a safe and easy way to use the electric light bulb (电灯泡). His invention c【小题5】our world.
Before the light bulb, it was so d【小题6】 at night that people could not do much work. Electric light changed that. Business grew. People could do more at night and they could do things during the day more e【小题7】. If you look at a picture of our planet from space at night, you can see how the light bulb changed life on Earth.
We depend on electric light from energy sources (来源) like oil, gas, or coal. But those energy sources c【小题8】pollution. One answer to this problem is to use a c【小题9】source of energy, for example, solar power (太阳能). Scientists have found a way to catch the energy of the sun’s light and save i【小题10】 to use later. So now the sun can light our homes at night.
