What does the passage tell us about American rivers?

admin2010-07-06  31

问题 What does the passage tell us about American rivers?
Last August, Susan and 42 other students got wet and dirty while removing six tons of garbage from the river running across their city. They cleaned up the river as. part of a week-long environmental camp. Like one in three
American rivers, this fiver is so polluted that it’s unsafe for swimming and fishing. Environmental scientists praised the teenagers for removing garbage that can harm wild life. Waterbirds, for example, can choke on plastic bottle rings and get cut by scrap metal. Three years ago, when the clean-up started, garbage was everywhere, but this year, the teenagers had to hunt for garbage. They turn the clean-up into a competition to see who could find the most garbage and unload their boats fastest. By the end of the six-hour shift, they have removed enough garbage to fill more than two large trucks. "Seeing all their garbage in the river makes people begin to care about environmental issues," Susan says. She hopes that when others read that she and her peers care enough to clean it up, maybe they will think twice before they throw garbage in the river.

选项 A、All the rivers used to be very dirty.
B、About one in three of the rivers are polluted.
C、All the rivers are unsafe and smelly.
D、Kids will go to the river bank to cam.

答案B

解析
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