阿摩線上測驗
6. Many people in big cities go to work by subway. Millions of ___come in and out of the subway stations every day.
(A) passengers
(B) systems
(C) tunnels
(D) waiters
答案：登入後查看
統計： A(32), B(4), C(4), D(4), E(0) #2347266
統計： A(32), B(4), C(4), D(4), E(0) #2347266
