阿摩線上測驗
10 Please turn off the light. We should save ____ ; otherwise, the bill might go up again.
(A) engine
(B) electricity
(C) elevator
(D) exhibition
答案：登入後查看
統計： A(135), B(1647), C(50), D(58), E(0) #727523
統計： A(135), B(1647), C(50), D(58), E(0) #727523
