阅读下面的短文，根据短文内容选择正确的选项。

I have a good friend. His name is Sam. He is from America. His father and mother are doctors. They work in the same hospital. They go to work by bus. Sam has a sister. Her name is Sandy. Every morning, Sam goes to school by bike, but Sandy goes to school on foot. Every evening, Sam plays computer games. His sister reads storybooks. Sam usually plays football in the park on Saturday, and Sandy often plays the piano at home.