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.