问题

Why do you look so worried? —Fred left the company half an hour agoHis work _______ unfinished since
A:left
B:was left
C:has left
D:has been left
B:was left
C:has left
D:has been left
正确答案是:
同类题型
He will spend six hours at his desk _______ he finishes his composition
The young actress looked so charming in her beautifuldress that we took _____pictures with her.
How do you like your English teacher— He is great. We friends since three years ago.
The room ___________ window is open is mine.
Jane’s parents suggested that she ______ a medical examination