17. If you "Transfer" in a Metro system, what does it mean?
(A) You buy a ticket
(B) You leave the station
(C) You move from one place to another, often changing trains
(D) You operate the train
答案:登入後查看
統計: A(10), B(3), C(205), D(3), E(0) #3154193
統計: A(10), B(3), C(205), D(3), E(0) #3154193