单选题All the club members&nbsp

问题补充：

单选题Alltheclubmembers_______thefloorwhentheyheardsomeone_______forhelp.A.swept; were shoutingB.swept; shoutedC.were sweeping; shoutingD.were sweeping; shouted

答案：

C解析when 引导的时间状语从句，从句的动作发生在主句的动作之中，故选C