Exercise. Choose the appropriate form of the Gerund.
1. Everybody enjoyed (being worked, working) with him.
2. He doesn't tike (inviting, having been invited) to their parties.
3. I am sorry for (having disturbed, being disturbed) you.
4. She entered the office without (noticing, being noticed).
5. She is angry at (having been sent, sending) for.
6. This film is worth (having seen, seeing).
7. We are proud of (being, having been) her pupils.
8. We can't excuse their not (answering, being answered) our invitation.
9. You should avoid (having been broken, breaking) rules.
10. I can't remember (seeing, having seen) him before.