Gerund vs. Infinitive

Answers

1. I look forward to meeting them.
2. He quit smoking two years ago.
3. Lock the door before going out.
4. I regret to inform you that your application has been rejected.
5. I saw him stealing / steal the money.
6. Sorry to interrupt you.
7. I am not used to living in a big city.
8. I want you to leave at once.
9. He used to work in a department store before he went abroad.
10. I was delighted to find your letter in my mailbox.
11. Your hair needs cutting.
12. That carpet needs cleaning.