(2013·四川省乐山一模)The pupils were playing games in the classroom ________ a gunman e

题干

(2013·四川省乐山一模)The pupils were playing games in the classroom ________ a gunman entered and began shooting wildly at them.

A．while	B．when
C．as	D．before

上一题下一题 0.64难度单项选择更新时间:2014-03-28 12:24:10

小学学科试题库

初中学科试题库

高中学科试题库