阅读短文,回答下面的问题

阅读短文,回答下面的问题
Jane always goes to school early ,She likes to talk with her friends before class.After school she goes home very late ,because she likes to look at the animats in a pet shop ,She likes dogs best,One dog is white .She watches itin front of the window of the shop for a long time.One day her father and mother ask her why she comes home very late,Jane tells them about the dog in the shop .Jane isn't late next day.She doesn't see the dog and she isn't happy,but she is also happy because that day is her birthday ,
Mother shows Jane a birthday cake and father gives her the white dog from the shop .Jane is very happy.She doesn't come home late any more .She runs home early to play with the dog.
Why does she go home early next day?_______________________________________________.
Why is Jane also happy?__________________________,