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题文

The climate change conference has come to __________ end, but the developing countries are dissatisfied with __________ small step that the developed countries have taken to reduce the emission(排放) of water gases.

A.不填, a B.不填, the C.an , a D.an, the
科目 英语   题型 单选题   难度 较易
知识点: 冠词的用法辨析
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