阿摩線上測驗
39. Once mainly ________ in banks and government buildings, video surveillance systems have now become standard
equipment for most stores in Taiwan.
(A)are seen
(B)to see
(C)seen
(D)having seen
答案：登入後查看
統計： A(15), B(14), C(61), D(27), E(0) #758666
統計： A(15), B(14), C(61), D(27), E(0) #758666
