I.combine each group of sentences into one. Use the words in brackets without chamhing them.
1.jack was able to run out of the house.It collapsed. (before)
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2.the rescue workers heard a whistle.they quickly came to rescue the victims. (on) 
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3.the soldiers searched the area.They found all the missing people in the landslide. (until)
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4.She gave us some tips.The tips were about identifying poisonous mushrooms. (about)
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5.The flood receded.The villagers came back to their home. (After)
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