阿摩線上測驗
16. The man sitting next to me on the plane was very nervous. He _______ before.
(A) hasn’t flown
(B) didn’t fly
(C) hadn’t flown
(D) wasn’t flying
答案：登入後查看
統計： A(95), B(28), C(304), D(4), E(0) #1814827
統計： A(95), B(28), C(304), D(4), E(0) #1814827
