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【单选题】
People in the United States today throw away _____ trash per day than people in the 1960s.
A.
1.72 pounds more
B.
6.4 pounds less
C.
2.68 pounds more
D.
4.4 pounds less
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】In 2009, RadioShack stopped selling _____.
A.
smartphones and other wireless devices
B.
lamps and stereo equipment
C.
cables, connectors, and widgets
D.
toasters and coffee grinders
【单选题】He's set to _____ from ten trays of worms eating garbage.
A.
make his fortune
B.
grow petunias
【单选题】He's building a business in New Jersey by turning the half a ton of waste into _____.
A.
6,000 bottles of fertilizer
B.
a trade secret
【单选题】Under the plastic tent is a, would you believe, a _____ built of worm waste.
A.
contraption
B.
gold mine