Unit 9 Wheels The cars of the future will be fine for getting round a city,but they will not be useful for long trips
If the car is powered by electricity,it will have two batteries,one for the motor and one for the horn,signals,etc
Little cars which are powered by gasoline will go 450 kilometers before needing to stop for more gasoline
If big cars are still used along with the small ones,two sets of roads will be needed in the future
Some roads will be used for the big,fast cars,and 3 . 根据短文内容,从下面所给选项中选出能够填入空白处的最佳选项
选项中有两项为多余选项
A.as these little cars can go as fast as big cars B.other roads will be needed for the small,slower ones C.the streets will be less crowded D.other roads are built for truck and other cars E.as these little cars can go only 65 kilometers per hour 【答案】 1—3 CEB Sec