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第三部分:阅读理解
What happens to old school buses when they can no longer safely carry kids to school? Most go to waste factories to be changed into pieces of metal. But a few of the old vehicles (车辆) find new lives in the center of Africa. Most of those buses end up on the streets of Kinshasa, the capital of the Democratic Republic of Congo.
The Kinshasa buses are that yellow color, which makes them stand out (突出) in the city’s heavy traffic, but the buses don’t look at all as they did in the United States. In Kinshasa their taillights(尾灯) are almost all missing or broken. They don’t obey traffic rules and often race around the city very fast. The buses compete with motorcycles, cars, trucks, and other vehicles for space on the road. They make loud sounds when moving, and they are packed with people carrying loads of goods, such as fish, milk, beans and onions.
However, Kinshasa business people love the old, yellow buses, which they buy from American companies, because the vehicles are strong, reliable (可依靠的) and inexpensive. A used bus sells for about $2,000 in Congo. A new bus is more expensive. In the United States, a new school bus with all its lights working costs about $80,000.
The fare (票价) to travel across the city is usually about 30 US cents. “Transport is a big problem in Kinshasa,” says passenger Bruce Kingambo. “But the yellow buses help people here get around.”
56．The underlined sentence in the first paragraph means “In the center of Africa some old US     school buses can be_________.”
A．useful                     B．expensive                C．free                        D．new
57．Before the school buses leave America for Congo, they_________
A．have broken taillights
B．don’t obey the traffic rules and move at full speed
C．carry many people and goods
D．don’t compete with other vehicles
58．How many used buses can you buy in Congo for the price of a completely new school bus     in the USA?
A．10.                         B．20.                         C．30.                         D．40.
59．The passage mainly tells us _________
A．how to use old school buses
B．about new lives for old school buses
C．to try to take old school buses
D．how to drive old school buses