阿摩線上測驗
20. Used wisely, smart phones could be a _______ in our modern society as they bring about huge
convenience.
(A) reproof
(B) boon
(C) tenor
(D) virtuoso
答案：登入後查看
統計： A(5), B(60), C(7), D(16), E(0) #2020384
統計： A(5), B(60), C(7), D(16), E(0) #2020384
