問題詳情

42 When fighting a wildfire, firefighters sometimes have to start a backfire to_____ the control lines.
(A)hinder
(B)loosen
(C)ripen
(D)widen

參考答案

答案:D
難度:適中0.411765
統計:A(2),B(0),C(5),D(7),E(0)

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