When I was very young, I wanted to become a veterinarian   one day, because I loved animals very much, especially dogs. However, there was no room in my adult life for a dog. Then, last year, I could not stand the fact that I developed cancer  . I wanted to keep a dog, but I knew my illness made it impossible for me to keep one. In early September, to my surprise, my doctor told me that I could keep a pet as my friend, because my immune system   was strong to keep a pet. The same day I went to an animal market with my friends. When I saw a 9-week-old dog with big brown eyes, nice ears and white _ all over the body, I took it home.I'm happy these days since Oscar came into my life. My new favorite pastime is to watch him sleep, eat and run. And I have been spending more time caring about him, taking long walks with him in the park. Now I still have the physical examination once a week at the hospital. But my illness has taken a turn for the better with the company of a dog. My immune system is getting stronger, my doctor tells me. Thanks to Oscar, my life has changed a lot. The writer used to want to be a  _  .
doctor teacher trainer veterinarian