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5. My faher used to go to work by bus last year but now he rides his bike.
6. There did not use to be many vehicles on the roads.
7. It is about 2 km.
8. They say that it is a must-see of 20th century.
9. In spite of being a poor student, Tom studied very well.
10. Although Tom had a good salary, he gave up his job.

5. My father didn't use to ride his bike to work.

6. There didn't use to be many vehicles on the road (in the past).

7. It is 1 kilometer from my house to school. 

8. Critics say that Titanic is a must-see of the 20th century.

9. In spite of being very poor, Tom studied very well.

10. Although Tom had a good salary, he gave up his job.