题目内容

All the club members _______ the floor when they heard someone _______ for help.


  1. A.
    swept; were shouting
  2. B.
    swept; shouted
  3. C.
    were sweeping; shouting
  4. D.
    were sweeping; shouted
C
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
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