阅读小短文，选出正确的答案。

Hello! My name is Tommy. I'm very happy today, because (因为) today is my birthday. I'm ten years old now. Look! I have a birthday gift. It's a tiger bag. I like the colour. It's yellow and black. My friend Mimi is yellow and black, too. Look! Mimi is coming. Haha, it's a cat. It's one year old. It's cute. I like it very much.