Once there was a boy in New York. His name is Sam. He started painting at the age of four, and when he was five, he was already very good at it. He painted many beautiful pictures, and a lot of people bought his pictures .Sam’s pictures were different from other people’s because he never painted on all of paper. He painted on half of it, and the other half was always empty. “ That’s very clever,” everybody said, “ No other painters have ever done that !” One day somebody asked him ,” Please tell me this, Sam .Why do you paint on the bottom（底部） half of your pictures , but not on the top half ?” “ Because I’m short,” Sam said, “ and my brushes can’t reach very high.” 小题1: Which country did Sam live in ?_____________ 小题2: Was Sam good at painting when he was five?_________ 小题3: What did Sam do with his pictures?_________________ 小题4: Were Sam’s pictures the same as others’?______________ 小题5: Why didn’t Sam paint on all of the paper?_____________