阅读理解

　　When Jimmy was a boy, he liked watches and clocks very much．When he was eighteen years old, he joined the army．One year later, he began to teach himself how to mend(修理)watches．A lot of his friends brought him broken watches, and he mended them all．

　　Then his captain heard about this．One day be brought Jimmy a watch too．and said．“My watch doesn’t work．Can you mend it for me, please?”

　　Jimmy said, “Yes, sir．I can．”After a few days，he brought the watch back to the captain．

　　“How much should I pay you?” the captain asked．

　　“One pound, sir．” Jimmy answered．Then he took a small box out of his pocket and gave it to the captain．

　　He said, “Here are three wheels from your watch．I didn’t find a place for them when I put everything back．”