I)
1. Anna used to have long hair when she was at school.
2. Mary didn't use to listen when her teacher were speaking.
3. Ricardo used to get up at 6.00 when he was training for the Olympics.
4. What did you use to do on Saturday mornings?
5. Sophie used to be afraid of dogs when she was a little girl.
6. We used to give our teachers presents at the end of term.
7. Did you use to live next door to Mrs. Harrison?
8. My brother used to wear glasses when he was young.
II)
1. A
2. F
3. K
4. Q
5. Q
III)
1. I used to stay up late to watch football matches last year.
2. There used to be some trees in the field.
3. Anna used to live with her parents before.
4. He used to a poor man before.
5. They didn't use to go to the cinema every Sunday last year.
6. In the past my hair used to be short.
7. I used 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.