问题

When did the computer crash?—This morning，while I ________ the reading materials downloaded from some websites.(2012·福建)

A:have sorted
B:was sorting
C:am sorting
D:had sorted

正确答案是：

同类题型

IfI ______ you, I _____ go with you.

We need the new comer have a try

Simon plays football every Monday and Thursday. He plays a week.

He was made ______ the floor after classyesterday.

It makes little difference _____ we go or stay — they are all trying their best to talk to Jason and no one will notice us.