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I/
1. Anna used to have long hair when she was at school.
2. Mary didn't use to listen when her teachers 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 evenings?
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 Tôi sẽ gọi cho bạn ngay khi tôi nhận được kết quả của mình.
2. F used to : đã từng
3. K (HTHT chuyển sang QKĐ V2/ed)
4. P should be V3/ed : nên được làm gì
5. C should be V3/ed

III/
1. I used to stay up late to watch football match last year, but now I don't.
2. There used to be some trees in the field, but now there aren't any.
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 use to go to the cinema every Sunday last year.
6. In the past my hair used to be shorter than that now.
7. I used to have time to collect stamps as 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, but now he goes to work by bus.
10. There used to be traffic jams in this street during rush hours, but now the street becomes wider.