阿摩線上測驗
31. For teachers, more time______ preparing the materials for classroom instruction than on the
actual instruction itself,
(A) is usually spending on
(B) spend on
(C) is usually cost on
(D) is usually spent on
答案：登入後查看
統計： A(6), B(5), C(0), D(12), E(0) #1420654
統計： A(6), B(5), C(0), D(12), E(0) #1420654
