阿摩線上測驗
31 Helen treated everyone from the office to that restaurant because she had a______ for 30% off.
(A) coupon
(B) factor
(C) option
(D) usage
答案：登入後查看
統計： A(202), B(4), C(6), D(5), E(0) #2294679
統計： A(202), B(4), C(6), D(5), E(0) #2294679
