There is at least one mistake in each sentence. Please help me find and corret

1. She longed the holidays to come so that she could be with her family again.

2. I overheard say that he is thinking of moving to Manchester.

3. They were seen climb throught the window.

4. Very reluctantly, he consented her to lend the money to Janet.

5. My parents always encouraged work hard at school.

6. For years the group has been campaigning an inquiry to hold into the accident.

7. I watched a pavement artist to draw a portrait in crayons.

8. Sam promised me to show me how to fish for salmon, but he never had the time.

9. It's easier to do it yourself than to explain to somebody else how to do it.

10. He was never heard say 'thank you' in his life.

11. This card entitles to take an extra person with you free.

12. They let me to borrow their car while they were on holiday.

13. I explained enough for her understanding what was happening.

14. To see him to walk down the street, you'd never know he was blind.

15. Most people are afraid hearing the truth about them.