`Đáp` `án:`

1. Men used to be the bead winner of the family and women used to depend greatly on men, 

2. Who used to take care of you when you were a toddler? 

3. Jim didn't use to be interested in reading books when he was small but now he's really into it.

4. My brother used to have his hair cut short when he joined the army.

5. Dennis used to smoke three years ago.

6. My parents used to live in the USA when they were young. 

7. Jim used to be my best friend, but we aren't friends any more. 

8. When he was younger, my uncle used to be a national swimming champion.

9. I eat ice-cream now, but I used to dislike eating it when I was a child. 

10. When Barbara was Italy, she used to stay with an Italian family. 

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used to: đã từng 

(+) S + used to + V1 

(-) S + didn't use to + V1 

(?) Did + S+ use to + V1?