It was a sunny summer day and I walked back home after school． When I stood in front of the door， I was shocked to find that the key had disappeared from my pocket． It was a disaster for me， because I only had one key and my parents were gone for several days．

I walked around the community， hoping to find the lost key． But I couldn't find it． I called my mum and she told me to go to my aunt's home． My aunt lives in another building of our community． I was sad， but I had no choice． The next morning， when I was going to school， I saw something shining on the window of the security hut （保安亭）． It was my key． "Unbelievable!" I was quite surprised as I held the key in my hands．

"Is that yours， kid？" the old guard asked．

"Yeah． I lost it yesterday． Who sent this？" I replied． The old man said， "I don't know， someone picked it up last night．"

To pick up a key from the ground and take it to the security hut is not something special， but it meant so much to me． I cannot express my thanks to the person who found my key． But I can pass on his or her kindness by following his or her steps to help others．

61． How many keys did the writer have？　　

62． Were the writer's parents at home or away from home？　　

63． Whom did the writer stay with for the night？　　

64． Did the old guard know who picked up the key？　　

65． What lesson does the passage give us？