阿摩線上測驗
7. As airplane pilots fly for many long hours, they are ____________ for the safety of hundreds of
people on board.
(A) understandable
(B) changeable
(C) believable
(D) responsible
答案：登入後查看
統計： A(2), B(7), C(21), D(72), E(0) #573483
統計： A(2), B(7), C(21), D(72), E(0) #573483
