阿摩線上測驗
16. I do not think that our boss is aware____ how expensive this trip can
be. We need to tell him about this fact immediately.
(A)in
(B)of
(C)at
(D)for
答案：登入後查看
統計： A(18), B(285), C(15), D(50), E(0) #2077785
統計： A(18), B(285), C(15), D(50), E(0) #2077785
