問題詳情

17. Acting like a blanket, _____ some of the Sun’s heat from reaching the Earth.
(A) clouds stopping
(B) and clouds stop
(C) clouds able to stop
(D) clouds stop

參考答案

答案：D
難度：適中0.636364
統計：A(3),B(0),C(1),D(7),E(0)