阿摩線上測驗
16. The marketing team _____ on the new advertising campaign since last month.
(A) is working
(B) works
(C) has been working
(D) worked
答案：登入後查看
統計： A(1), B(1), C(20), D(1), E(0) #3895739
統計： A(1), B(1), C(20), D(1), E(0) #3895739
