阿摩線上測驗
19. The new system offers a very useful feature—identifying and blocking _____ calls with no added cost.
(A) arid
(B) quadruple
(C) dense
(D) scam
答案：登入後查看
統計： A(8), B(15), C(14), D(46), E(0) #1850361
統計： A(8), B(15), C(14), D(46), E(0) #1850361
