阿摩線上測驗
45. __________ you should have no trouble with the difficult work.
(A)Knowing this
(B)If you are
knowing this
(C)From knowing this
(D)If you had known this
答案：登入後查看
統計： A(201), B(37), C(43), D(127), E(0) #1515764
統計： A(201), B(37), C(43), D(127), E(0) #1515764
