The key answer of exercise 6

a)

1. refuse
2. apologise
3. promise
4. threaten
5. accuse
6. offer
7. suggest
8. admit
9. deny
10. agree

b)

1. He refused to let me pay for the meal.
2. I apologised for causing any embarrassment.
3. We promised to reduce taxes if you voted for us.
4. She threatened to quit the show (unless she got more money).
5. He accused Leona of stealing his wallet.
6. They offered to share the information (with me / us).
7. She suggested taking a break (for a few minutes).
8. He admitted stealing €5,000 from the bank
9. He denied ever having had cosmetic surgery.
10. She agreed to make a speech.