[单项选择]　第三篇 　　Saving Gas 　　There are more than 100 million cars in the U.S. An ordinary car gets less than 15 miles from each gallon of gas. It travels about 10,000 miles each year. In that time, it uses about 650 gallons of gas. In all, automobiles use up some 70 billion gallons of gas a year. That comes out be four-and-half million barrels a day. 　　The importance of saving gas, then cannot be stressed too much. Let’s say, the fuel used by each car could be cut back just 15 percent. This could be done by making fewer trips each day. It could be done by keeping the automobiles in good shape. It could be done through better driving habits. If these were done, the nation’s use of fuel would fall by close to two thirds of million barrels per day. 　　Everyone can help to save gas. One way is to ride buses. Some could walk to work. Others could ride their bikes. Another way is to share a ride. About one-third of all cars are used for going to and from work. You can go shopping with a friend fro
A. An ordinary car can run a lot more than 10,000 millions with 650 gallons of gas.
B. An ordinary car can run no more than 15 miles with one gallon of gas.
C. An ordinary car with ten gallons of gas can run no more than 150 miles.
D. An ordinary car can run 10,000 miles each year with 70 billion gallons of fuel.