阿摩線上測驗
5. It is a serious issue that many elementary school students are bringing smart phones to school, without their parents' knowledge and ____.
(A) origin
(C) alternative
(B) selection
(D) consent
答案：登入後查看
統計： A(0), B(0), C(0), D(1), E(0) #3373256
統計： A(0), B(0), C(0), D(1), E(0) #3373256
