问题

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

A:had left
B:has left
C:has been left
D:was left

正确答案是：

同类题型

I’ m so busy. If I time,I travel around.

This is Sports News. The Lakers ____ again last night. The Nets beat them to nothing.

The post office is about five kilometers ______ our school.

The reasonhe made such kind of mistakes is that he has had no _______ experience of this kind of job.

We really don’t know _______. Could you help us