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【单选题】

An advantage to the gasification process is that it ____.

A.
encourages responsible waste practices
B.
is cleaner than wind and solar power
C.
uses trash already in landfills
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参考答案:
参考解析:
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举一反三

【单选题】The host and the guest agree that more energy research is needed because ____.

A.
all energy alternatives have disadvantages
B.
gasification is a perfect energy solution
C.
people are conserving too much energy