阿摩線上測驗
21 It's a simple act of _______ to always hold the door for the person behind you.
(A) courtesy
(B) frequency
(C) harvest
(D) impulse
答案：登入後查看
統計： A(47), B(5), C(4), D(7), E(0) #3429325
統計： A(47), B(5), C(4), D(7), E(0) #3429325
