問題詳情

【題組】28. Before the invention of cars, horses heavy things.
(A) were used to carry
(B) used to carry
(C) are used to carry
(D) were used to carrying

參考答案

答案：D[無官方正解]
難度：適中0.5
統計：A(2),B(1),C(1),D(1),E(0)