阿摩線上測驗
105. Customers are advised to keep their receipts _________ proof of purchase for warranty claims.
(A) as
(B) to
(C) on
(D) of
答案：登入後查看
統計： A(172), B(52), C(19), D(6), E(0) #3804463
統計： A(172), B(52), C(19), D(6), E(0) #3804463
