Choose the correct alternative. In one sentence,
both alternatives are correct. Which one?

1 When he was small, he used to/would be really shy.
2 I used to study/studied in Ireland for two months.
3 I use to/usually go to the cinema at the weekend.
4 Last year my brother had/used to have a big party
to welcome his American friend.
5 Did you use/used to have a pet?
6 Children used to/would work in factories in Britain
in the 19th century.
7 They didn't use to/wouldn't go out on Friday
evenings, but now they do.​