阿摩線上測驗
17._______ you want to buy the concert ticket, you can use that machine to buy
it.
(A)Before
(B)If
(C)So
(D)But
答案：登入後查看
統計： A(25), B(439), C(4), D(1), E(0) #1735377
統計： A(25), B(439), C(4), D(1), E(0) #1735377
