______ I heard the alarm, I was having breakfast., when, ______ the children were hiding behind the sofa, their mother was looking for them., while, ______ the ball hit the window, Mr Lee was holding a cup., when, ______ Emma was learning to ride a bicycle, she hurt her knee., while, ______ we left the house, it was snowing., when, ______ the farmer was growing vegetables, he kept notes about the weather., while, ______ I was having lunch, I heard a loud crash., while, ______ Ben was holding the ladder, Alex was repairing the roof., while, ______ the dog hurt its paw, it was running through the garden., when, ______ I heard his voice, I knew who was calling., when

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