—Why do you look so worried?—My computer broke down and my essay unfinished since.A. had

发布时间：2020-08-16 20:58:53

—Why do you look so worried? 
—My puter broke down and my essay      unfinished since.
A. had left
B. has left
C. was left
D. has been left

网友回答

A. had left
B. has left
C. was left
(答案→)D. has been left
解析：考查时态。Since是现在完成时的标志，essay与leave之间是被动关系。
以上问题属网友观点，不代表本站立场，仅供参考！