問題詳情
125.By the time the client called, the salesperson _____ on the proposal for three daysstraight and was relieved to finally have the chance to present it.
(A) will be working
(B) has been worked
(C) had been worked
(D) had been working
參考答案
答案：D
難度：適中0.518
書單：沒有書單，新增