14．. Wind power is an ancient source of energy we may return in the near future. A. on which B——青夏教育精英家教网—

摘要：14．. Wind power is an ancient source of energy we may return in the near future. A. on which B. by which C. to which D. from which

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（上海卷38）. Wind power is an ancient source of energy we may return in the near future.

A. on which B. by which C. to which D. from which

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