問題詳情

29. The emissions from vehicles and local industries have seriously ___ topolluting the environment, typically accounting for 15% to 30% of totalurban waste.
(A) damaged
(B) provided
(C) contributed
(D) caused

參考答案

答案:C
難度:困難0.25
統計:A(31),B(11),C(26),D(36),E(0)

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