問題詳情

31. For teachers, more time______ preparing the materials for classroom instruction than on theactual instruction itself,
(A)is usually spending on
(B)spend on
(C) is usually cost on
(D) is usually spent on

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)