阿摩線上測驗
67.When it comes to catching the bad guys, a ________ camera is a police officer’s best friend.
(A) medium
(B) protection
(C) surveillance
(D) treasure
答案：登入後查看
統計： A(6), B(13), C(55), D(3), E(0) #664982
統計： A(6), B(13), C(55), D(3), E(0) #664982
