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

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

题型:不详难度:来源:
In case of fire, stay low to the ground in a smoky room, ________ smoke always rises towards the ceiling.
A.asB.whenC.whileD.once

答案
A
解析

试题分析: 考察连词辨析。A因为,随着;C当…时;C当…时;然而;尽管;D一旦;句义:万一遇见了火灾,在有烟的房间里要弯腰到地面,因为烟总是向上到天花板的。根据句义说明上下文之间有因果关系,故使用as连接上下文。故A正确。
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