阿摩線上測驗
117. Before ______ the final contract, please ensure that all the terms regarding the warranty period are clearly defined.
(A) sign
(B) signing
(C) signed
(D) signature
答案：登入後查看
統計： A(25), B(181), C(12), D(3), E(0) #3805305
統計： A(25), B(181), C(12), D(3), E(0) #3805305
