读短文完成下列两项任务。 Here are two cars. They may some day (1)_____ the place of today's big cars. If we use such cars in the (2)_____, there will be less pollution in the air. There will be more (3)_____ for parking cars in cities, and the streets will be less crowded. Three such cars park in the space that is needed for one of today's cars. The little cars will be very cheap. They will be very safe, too, because these little cars can go at a (4)_____ of only 65 kilometers per hour. The cars of the future will be fine for getting around a city, but they will not be useful for long trips. If the car is powered by electricity, it will have two batteries-one battery (蓄电池) for the motor and the other for the lights, signals, etc. If the little cars run on gasoline (汽油), they will go 450 kilometers before they need to stop for more gasoline. If big cars are still used along with the small ones. We must (5)_____ two sets of roads, one for the big, (6)_____ cars and the other for the (7)_____, slow ones. 1. 根据上下文填词，完成短文，每空一词。 (1)______(2)______(3)______(4)______(5)______(6)______(7)______ 2. 根据短文内容将句子补充完整。 (1). If we use these little cars in the future, there will ______ in the air. (2). In the space for one of today's cars we will be able to park ______. (3). The cars of the future will be fine for ______. (4). If small cars are used along with today's big ones, we must build two sets of ______.