第35题: [单项选择]Recent studies have identified four major global environmental risks; acid rain, ozone depletion, deforestation and the greenhouse effect. A. recognized B. proved C. got rid of D. multiplied 参考答案:A 答案解析:recognize认可,承认;prove证明,检验;get rid of消除;multiply繁殖,增加;identify识别,鉴别。