Use "I", " you", "he", " she", "am", " it", "we" or "they" 1. ... is a doctor,and ... am a vet. 2. This is out house. ... is very nice and comfortable. 3. What's this? ... is my cat, ... is not very friendly. 4. How are ...? - ...'m fine,thanks. And ...? 5. Meet Tom and Betty, ... are my best friends. 6. ... am a first year student. ... am very happy. 7. My sistet is a teacher. ... is thirty years old. 8. ... are a very happy family.
He is a doctor, and I am a vet.This is our house. It is very nice and comfortable.What's this? It is my cat, she is not very friendly.How are you? - I'm fine, thanks. And you?Meet Tom and Betty, they are my best friends.I am a first-year student. I am very happy.My sister is a teacher. She is thirty years old.We are a very happy family.