III.
1. He lives in a building where is very old.
2. I will tell you something which you didn't know before.
3. I will never forget the day when I met you.
4. Tom still went swimming although it was cold.
5. John is very sad because he fails the final exam.
6. Hw never left the house where he had been born.
7. I met the man who works in a bank.
8. Here are the letters which arrived this morning.
9. Although my grandfather is very old, he is still young at heart.
10. Tom gets a lot of money because he works hard.
IV.
1. will have
2. find
3. had fed
4. will have
5. will happen
6. press
7. had had