阿摩線上測驗
19. By the time his boss________ back from Singapore, he will already have finished the project.
(A) gets
(B) got
(C) will get
(D) gotten
答案：登入後查看
統計： A(356), B(36), C(21), D(13), E(0) #2982916
統計： A(356), B(36), C(21), D(13), E(0) #2982916
