阿摩線上測驗
28. There is a technical help-desk _______ dealing with any technical problem that may occur.
(A) which responsible
(B) is responsible
(C) which is responsible for
(D) being responsible for
答案：登入後查看
統計： A(23), B(16), C(188), D(17), E(0) #2552190
統計： A(23), B(16), C(188), D(17), E(0) #2552190
