Question

1)Complete the sentences with used to and the verbs in parentheses.

Example: I used to work (work) in London. 6. Where_____you___(study)?​

Answer 1

Oi, tudo bem? A resposta seria

Where did you used to study?

Ao fazer uma pergunta usando "used to", você basicamente deve usar o verbo auxiliar did ou didn't. Alguns exemplos:

Did Laura used to play soccer?

Did you used to study everyday when you was a child?

Where did you used to work?

Vendo os exemplos, podemos dizer que a estrutura é

Did (ou didn't)+ sujeito+ used to+ verbo no infinitivo+ complemento

Espero ter ajudado, bons estudos! :)