单选题

A It is not comfortable.

B It is difficult to steer.

C It cannot go long distances without recharging.

D Its engine easily overheats.

解析：
[考点]细节题。录音中提到电动汽车最大的问题是它的电池所能提供的能量是有限的，后面又举了一个例子说明了电动汽车在再次充电之前，它的行程是十分有限的，而普通的燃料汽车一油箱油所能维持的路程则要多得多，并且普通汽车加油只要几分钟。由此可知C项正确。
【听力原文】
　　Our electric car is the way of the future. Automobile manufacturers are under the pressure of the governments to develop cars that do not pollute. These cars must put no pollutants whatsoever into the atmosphere. So the automobile companies are working hard to meet these standards.
　　So far the electric car seems to be the best alternative. [21] So the biggest advantage of electric cars is that they don’t pollute. However, they will be in competition with gas-powered cars. And that’s where the witnesses come out. [22] The big problem is that the batteries in electric cars weigh a lot relative to the amount of power they deliver. For instance in one electric car the batteries weigh 400 kilograms and they provide enough energy to go 250 km before recharging, which take 8 hours. Compare that to a moderately fuel-efficient conventional car it can go 400-700 km on the tank of gas. And refilling takes just minutes. If there are other drains on an electric car’s batteries besides a motor, headlights, air-conditioning or a heater, its already limited range would be significantly reduced. So automobile engineers are trying to make more powerful batteries that would increase the car’s range and make them more attractive to buyers.
Questions 20 to 22 are based on the passage you have just heard.
20. What is the passage mainly about?
21. What is the main advantage of electric cars?
22. What is the main drawback of an electric car?