問題詳情

54. Many companies are____ trying to find new ways to make electricity. Some have comeup with special floor tiles that create energy.
(A) tightly
(B) suddenly
(C) constantlly
(D) nearly

參考答案

答案：C
難度：適中0.666667
統計：A(0),B(1),C(2),D(0),E(0)