(2009·湖北)Asthereislessandlessc

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更新 2022-09-03
科目英语
题型单选题
难度中等
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(2009·湖北) As there is less and less coal and oil, scientists are exploring new ways of making use of __________ energy, such as sunlight, wind and water for power and fuel.

A．primary

B．alternative

C．instant

D．unique

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_______no doubt that a green campus plays an important role in the growth of students, both physically and mentally.

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