問題詳情

【題組】42. Light ___faster than sound.That’s why a flash of lightening is followed by the sound of thunder.
(A) traveled
(B)will travel
(C)travels
(D) is traveling

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)