I Won"t Be So Careless Again!

　　One day I went out and left my key in the house. When I came back, I found I couldn"t get in without my key.

　　What should I do? After a moment, I got an idea. I picked up a big stone and was ready to break the window. Suddenly there came a deep voice, What are you doing? I turned over and saw a policeman was behind me. It took me quite a long time to explain myself. I won"t be so careless again.