Answer
Объяснение:
1. I am happy, have received an email from my friend.
2. Horray! You've won the lottery!
3. I have not seen your jacket.
4. He has not sent the letter, it is still on the table.
5. Have you read the latest Harry Potter book?
6. Have you ever met Mary?
7. I have not taken my dog for a walk for a long time.