阅读短文，判断句子正误。

Hello, I'm Betty. Look at my study(书房). It's new and nice. What's this on the chair? It's my jacket. It's red. Where's my pencil case? Look! It's on the desk. You can see a pen, a ruler, a rubber and a pencil in it. What's that beside the desk? Oh, it's my ball. I like my study.