問題詳情

39. The students left the classroom with the air-conditioner ________ and the fans turned on, which caused hugewaste of electricity.
(A)being operated
(B)operated
(C)operating
(D) was operating

參考答案

答案:C
難度:困難0.35914
統計:A(74),B(172),C(167),D(52),E(0)

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