阿摩線上測驗
46. It took about ______ for computers to become less expensive.
(A) 10 years
(B) 20 years
(C) 30 years
(D) 40 years
(E) 50 years
答案：登入後查看
統計： A(24), B(77), C(198), D(14), E(5) #1961117
統計： A(24), B(77), C(198), D(14), E(5) #1961117
