Electric cars are better than petrol cars in several ways. The biggest benefit is reduced pollution. In areas where there is a high percentage of electric cars, there is less pollution. But it is important to understand that electric cars still cause pollution. Remember that the electricity to power electric cars has to come from somewhere, which is most likely a power station. Unless these power stations run on solar or wind energy, they are most likely burning fossil fuels to make electricity. The second benefit of electric cars is a reduction in the dependence on foreign oil. There are several countries, including the United States, that don’t want to rely on oil coming from other countries to power their transportation systems. They want the power to come from within their country, and since electric cars can run on electricity from coal or nuclear power stations, there is less of a need to import oil. 17.Electric cars aren’t better than petrol cars. 18.Electric cars cause less pollution. 19.People use electricity to power electric cars. 20.In many countries, people don’t want to import oil more. 21.Which is the best tittle for the passage? A. Petrol cars B. Power C. Electric cars D. Benefit of electric cars 22.The word "rely on" in row 7 means __________. A. base on B. go on C. keep on D. come on