【解析】　细节理解题。根据第二段的"But one of the largest sources of air pollution is the burning of fossil fuels such as coal and gasoline which is used to power a car's engine." 可知答案。

　　【答案】　D

　　2．According to the passage，the word"hybrid"refers to________．

　　A．a hightech discovery

　　B．energy saving

　　C．a new invention

　　D．a combination of two things

　　【解析】　词义猜测题。由文章第三段的第一句"A hybrid car is a combination of a regular car that runs on gasoline and an electric car that is battery powered." 可知答案。

　　【答案】　D

　　3．"Regenerative breaking" is an important process of the hybrid car because________．

　　A．it allows the car to come to a quick stop

　　B．it gives the driver a smoother ride

　　C．it produces energy to charge the battery

　　D．it can control the speed of the car

　　【解析】　细节理解题。由文章第三段的"The 144 volt battery pack is...because it generates electricity."可知答案。

　　【答案】　C

　　4．Which of the following is right about the EPA?

　　A．They designed hybrid cars.

　　B．They outlawed(宣布......为不合法)the burning of fossil fuels.

　　C．They set important guidelines that help control pollution.

　　D．Their main purpose is to protect endangered plants and animals.

　　【解析】　细节理解题。由文章第二段的第三句可知答案。

　　【答案】　C

Ⅳ.完形填空