Most experts agree that human activities such as the clearing of large areas of forests, and farming on a large scale the problem of global warming.
A. is leading to
B. is resulting in
C. are contributing to
D. are owing to
网友回答
A. is leading to
B. is resulting in
(答案→)C. are contributing to
D. are owing to
解析：考察主谓一致和词义辨析。Activities 是从句的主语，所以选C和D; 按句子意思应选词义为“导致”的选项contribute to.故C正确。