問題詳情

9. To ____________ the colors in the old paintings, the museum does not allow any picture-takingwith flash light.
(A) weaken
(B) melt
(C) preserve
(D) afford

參考答案

答案：C
難度：適中0.62963
統計：A(3),B(4),C(17),D(3),E(0)