Electricity is very useful in our daily lives. It is said to be one of the greatest1 in human history. It lights our world, 2 our homes, cooks our food and gives us lots of happiness. Electricity brings brightness. Today, almost everyone around the world uses electricity in one way or another. It is 3 to imagine our life without it. When the power is off, schools, offices, shops and factories cannot 4 at all. Without electricity, our5 would be very difficult. In large cities, electricity lights the streets and buildings. It warms people and 6. People can heat food in microwaves. Electricity also cools our food in7. Electricity drives underground trains, works traffic lights and lifts the machines in factories. Radios, televisions and computers use electricity to bring entertainment（娱乐）and news to millions of 8 every day. In the countryside, electricity also helps a lot. In villages and on farms, electrical machines milk the cows. They also cool the milk and keep it 9for us to drink. In fact, electricity is used as much in villages as it is used in 10.