Put personal pronouns in brackets in the objective case:

1. My friend sends (I) many letters. 2. His brother knows (he) well. 3. I often see (they) in the park. 4. Don't ask (he) about his wife. 5. Do you know Itali­an? — No, I don't know (it) at all. 6. Sometimes we meet (she) at the Browns. 7. Our mother greets (we) every morning. 8. Your son studies together with (she), doesn't he?