Recent studies have identified four major global environmental risks: acid rain, ozone depletion, deforestation and the greenhou

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问题 Recent studies have identified four major global environmental risks: acid rain, ozone depletion, deforestation and the greenhouse effect.

选项 A、recognized
B、proved
C、got rid of
D、multiplied

答案A

解析本题中，identify意为“识别，鉴别”。四个选项中，recognize意为“认可，承认”，如：recognize this new government(承认这个新政府)。prove意为“证明，检验”；get rid of意为“消除”；multiply意为“繁殖，增加”。只有A项符合题意。

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