The Development of Electric Cars
Electric cars may seem like a recent invention, but they have been around for years. In the early 1900s, there were 1 electric cars on the road than gasoline (汽油) cars, because at that time, gasoline was expensive compared with other fuels (燃料), electric cars were more popular.
When gasoline 2 dropped and new technologies on gasoline cars were developed, electric cars were out of date. Gasoline cars became more popular 3 , because they could go farther without stopping.
During the 20th century, gasoline cars got bigger, heavier and faster. They needed more fuel, and it 4 more air pollution. For years, the car makers didn't worry about pollution. They didn't worry about how much gasoline cars used, either. But when people began to 5 that there was not enough oil on the earth, they asked carmakers to produce more efficient (高效能的) and less polluting cars.
One 6 of solving the problem was a "hybrid" car (混合动力车), one that ran partly on gasoline and partly on electricity. Hybrid cars became popular in the 2000s because gasoline prices went up while prices ofhybrid cars went 7 .
An all-electric car uses no gasoline. The problem, however, is that car batteries (电池) need to be recharged (再充电). That makes electric cars not so 8 for long journeys. Many people are not pleased with it. The government and carmakers are working together to 9 safe, cheap and useful electric cars. When more and more people have these electric cars in the future, a gasoline station may 10 .