阿摩線上測驗
33 After the chilling murder, _____ cameras were installed throughout the area to reduce the risk of crime.
(A)protection
(B)control
(C)surveillance
(D)observation
答案：登入後查看
統計： A(2), B(1), C(8), D(3), E(0) #3930801
統計： A(2), B(1), C(8), D(3), E(0) #3930801
