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1. There used to be some small houses on this farm.
2. The air in this area used to be very fresh. 
3. We aren't interested in Japanese food. 
4. He used to smoke a lot.
5. I am trying to get used to getting up early.
6. There used to be law that restricted hunting and fishing in the past.
7. Wild animals are interested in living in their natural environment.
8. This pen is usually used to sign important contracts.
9. I think he isn't used to driving on the left because he has never been to Britain before.
10. Gold was used to guarantee the value of paper money.
11. What is this machine used for?
12. He used to work 14 hours a day when he was young.
13. I am not used to living in the cold weather.
14. We used to be told stories before going to bed.
15. After some weeks, I think you will get used to cold weather.