阿摩線上測驗
33.
(A) many had been trained
(B) many had trained
(C) many trained
(D) many being trained
答案：登入後查看
統計： A(12), B(0), C(7), D(6), E(0) #3436355
統計： A(12), B(0), C(7), D(6), E(0) #3436355
