$1$. I used to stay up late to watch football matches last year.
$2$. There used to be some tress in the field.
$3$. Anna used to live with her parents.
$4$. He used to be a poor man, but he becomes a rich businessman.
$5$. They didn't used to go to cinema every Sunday last year.
$6$. In the past my hair used to be shorter.
$7$. I used to have much time to collect stamps when I was in primary school.
$8$. Did you use to go to the beach when you lived in Nha Trang?
$9$. Mr. Hung used to go to work by motorbike.
$10$. There used to be traffic jams in this street during rush hours.