阿摩線上測驗
125 If the manager _____ about the delay earlier, he could have contacted the client.
(A) had known
(B) knows
(C) has known
(D) knowing
答案：登入後查看
統計： A(440), B(130), C(102), D(16), E(0) #3772633
統計： A(440), B(130), C(102), D(16), E(0) #3772633
