单选题 What do you do with your empty cans and bottles? There are two choices, throwing them away or recycling them. Throwing away a metal beverage (饮料) container wastes as much energy as filling a can with gasoline and pouring half out. Besides wasting energy, throwing away bottles and cans causes pollution, increases the volume of solid waste, and uses up natural resources. To control these problems, only nine states have adopted bottle laws. The United States government should require every state to have a bottle law or impose (制定) a national bottle law.
To understand how a bottle law can help, you must know how it works. When consumers buy canned or bottled beverages at a store, they pay deposits. This deposit can range from twenty to fifty cents per bottle or can. In order to get this deposit back, the bottles and cans must be returned to supermarkets after they are emptied. The supermarkets then return the bottles and cans to their manufacturers for either reusing or recycling.
Bottle laws are currently effective in Oregon, Vermont, Maine, Michigan, Iowa, Connecticut, Delaware, Massachusetts, and New York. These laws work largely because the general public supports them. A recent poll (民意测验) of Americans revealed that 73 percent support bottle laws. This support undoubtedly results from people's concern about pollution and our planet's limited resources.

单选题 What is the bad thing if one throws away metal cans after drinking?
A. It causes personal inconvenience.
B. It's like pouring half of the gasoline out.
C. It goes against the national law.
D. It wastes energy.

单选题 When people throw away metal containers they have an effecton the environment by ______.
A. causing pollution B. using natural resources
C. recycling them D. preserving natural resources

单选题 What does the author suggest in order to solve the problems of cans and bottles?
A. Having the manufacturers recycle the containers.
B. Preventing people from pouring out beverage.
C. Introducing a national bottle law.
D. Putting the bottle laws into effect.

单选题 Who would pay the deposits for the beverage containers?
A. The manufacturer. B. The supermarket.
C. The consumer. D. The government.

单选题 According to the author, a bottle law can work if ______.
A. the nine states support it
B. the consumers pay deposits
C. the manufacturers recycle the empty containers
D. the consumers, supermarkets and manufacturers make a joint effort