Combine each group of sentences into one. Use the words in brackets without chamhing them

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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