请教各位一道高中英语题~-Why do you look worried?-Fred left the company half _英语解答

请教各位一道高中英语题~
-Why do you look worried?
-Fred left the company half an hour ago.His work _unfinished since.
A.leftB.was leftC.has leftD.has been left
最好还要有很详细的解释啦~我基础不是很好

人气：311 ℃　时间：2020-03-29 20:14:48

解答

Why do you look worried?
-Fred left the company half an hour ago.His work _unfinished since.
A.left B.was left C.has left D.has been left
D
since.Fred 一小时前离开了公司.从那以后,他的工作就留着一直没完成.
用现在完成时,work是被留下的所以是被动态.