阅读理解．

　　Mr Clarke worked in New York and brought his family to China．They visited many places of interest and had a good time here．Before they left for Shanghai, the Clarkes climbed up the Great Wall．It was the greatest project(工程)about three thousand years ago．They took a lot of photos there and then they had a picnic under a big tree．Suddenly it began to rain and they hurried to the car．And when they returned to the hotel, they couldn't find the bag in which their expensive camera(照相机)was．They were all sorry for it．They could buy another camera but had no time to go to the Great Wall again．They could not miss the plane!

　　That evening they didn't have supper．Mr Clarke hoped to make them happy and said, “Well, let me tell you a story．An old man lived in a sixty-storey(层)building．One day he fell down from it when he was cleaning the window．But he didn't hurt himself．”

　　“It was a miracle(奇迹)！”called out his children, “Why?”

　　“Because he lived on the first floor!”

　　They all began to laugh while two policemen with a bag came in．They said a Chinese boy found it under the big tree and he asked them to find out who lost it．

　　“It's really a miracle!”the Clarkes said happily．

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