1 They went/had gone shopping and bought/
had bought a tent for their hiking trip.
2 She read/has read the book a few years ago.
3 They drove/were driving to the house when
the car broke/was breaking down.
4 When did you start/have you started rock
climbing?
5 They realised/were realising that they were
losing/had lost their way so they stopped/
had stopped to get directions.​

1 They went shopping and bought a tent for their hiking trip.

2 She read the book a few years ago.

3 They were driving to the house when

the car broke down.

4 When did you start rock

climbing?

5 They realised that they had lost their way so they stopped to get directions.​

Объяснение:

все предложения составлены правильно, кроме №8.

правильный вариант - the door had been locked. (в исходном предложении глагол стоит в past perfect, значит, мы строим предложение в past perfect passive)

и предложение №4 должно быть следующим: a great deal of tea is drunk in england.

пассивный залог используется и с модальными глаголами тоже, например

the flowers must be watered.- цветы должны быть политы.

the flowers should be watered. - цветы следует полить.

the flowers can be planted here. - цветы можно посадить здесь.

the flowers have to be sold. - цветы придется продать.

и т.д.