問題詳情

31. The old man, ___d_________abroad for twenty years, is on the way back to his motherland.
(A) to work
(B) working
(C) to have worked
(D) having worked

參考答案

答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)