—Why do you look so worried? —Fred left the company half an hour ago. His work unfinished

发布时间：2020-08-17 14:37:01

—Why do you look so worried?  
—Fred left the pany half an hour ago. His work      unfinished since.
A. left
B. was left
C. has left
D. has been left

网友回答

A. left
B. was left
C. has left
(答案→)D. has been left
解析：考查时态和语态。因句中有since所以要用完成时，又因空前主语是事情，所以要用被动。
以上问题属网友观点，不代表本站立场，仅供参考！