It is difficult for him to give up smoking.
2. It was impossible to forget the bike.
knowing a map means being able to show any country or city on it.
4. It took us twelve days to search for the islands.
5. it was impossible to restore the past.
6. He used to stop every August to take his family out to sea for a change of air.
7. to look at this stage would be very sorry.
8. It took him half an hour to mention the words in the dictionary.
9. It takes an effort to lose weight.
10. I hardly need to say how grateful I am for everything you have done.
1. to give up / to stop
2. to repair
3. To know
4. to search
5. To forget
6. to take
7. To stop / to give up
8. to look up
9. to lose
10. to mention / to say