In case of fire, stay low to the ground in a smoky room, ________ smoke always

题干

In case of fire, stay low to the ground in a smoky room, ________ smoke always rises towards the ceiling.

A．as

B．when

C．while

D．once

上一题下一题 0.64难度单项选择更新时间:2013-12-02 02:40:06

小学学科试题库

初中学科试题库

高中学科试题库