問題詳情

II. Grammar Choice:15% 21. ________ given us advice, we would have wasted much time on useless methods.
(A) If he has not
(B) Were he not
(C) If he didn’t
(D) Had he not

參考答案

答案：D
難度：非常困難0
統計：A(0),B(0),C(1),D(0),E(0)