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

问题详情：

---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

知识点：现在完成时及其被动式

题型：选择题