giúp hộ dg gấp lắm ạ

`5.` They didn't use to go to the cinema every Sunday last year.

`6.` In the past my hair used to be much shorter than now.

`7.` I used not to collect stamp when I was in primary school.

`8.` Did you use to go to the beach when you lived in Nha Trang?

- Cấu trúc used to: sự việc thường xuyên xảy ra trong quá khứ

- Cấu trúc: S + used to + V

- S + often + V + ... + MĐQK = used to + V + (MĐQK)