All the students were sweeping the floor_____they heard a man ____"help"A.when; shouting B.while;to shout Cwhen;to shout D.while;shouting

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Allthestudentsweresweepingthefloor_____theyheardaman____"help"A.when;shoutingB.while;toshoutCwhen;to

All the students were sweeping the floor_____they heard a man ____"help"A.when; shouting B.while;to shout Cwhen;to shout D.while;shouting
All the students were sweeping the floor_____they heard a man ____"help"
A.when; shouting B.while;to shout Cwhen;to shout D.while;shouting

All the students were sweeping the floor_____they heard a man ____"help"A.when; shouting B.while;to shout Cwhen;to shout D.while;shouting
A
所有的学生正在打扫地板,突然他们听到一个人喊　救命
显然在那一瞬间那个人正在喊救命　
这里when　不是当.的时候的意思,而是表示突然

A

A while 表示“同时” shouting 是进行时，因为听见的时候是正在喊 学习是一件愉快的事！ (*^__^*) 请及时采纳，多谢！ A while表示两个事件

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