---Whydoyoulooksoworried?  ---Mycomputerbrokedownandmye...

問題詳情：

---Why do you look so worried?

   ---My computer broke down and my essay _____unfinished since.

A. was left       B. has left      C. left       D. has been left

【回答】

D

知識點：現在完成時及其被動式

題型：選擇題