新概念英语2三单元每课作文是什么意思？

新概念英语2三单元开始每课的作文是什么意思？给举个例子，像49课的作文

答案是，A young man in Teheran bought a real bed for the first time in his lift.He slept on the rf of his house because the weather was hot.Three nights later,thebed was swept off the roof during a storm.The man was not only unhurt but still on his mattress. As the bed was in pieces,he carried his mattress indoors and after he had put it n the floor he went back to slrrp. .