—When did the computer crash?—This morning，while I ________ the reading material

题干

—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

上一题下一题 0.64难度单项选择更新时间:2014-03-28 03:49:09

小学学科试题库

初中学科试题库

高中学科试题库