問題詳情

32. The air _____ by car fumes, especially in the city.
(A) is polluting
(B) polluted
(C) been polluted
(D) is being polluted

參考答案

答案:[無官方正解]
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)

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