Complete the sentences with the past perfect form of the verbs in brackets.

1 Marco Polo _________ (visit) many different countries by the time he returned to Venice in 1295.

2 She _________ (learn) to speak Turkish before she went to live in Ankara.

3 When I got to the classroom, the class _________ (go) to the sports hall.

4 Before he went to the South Pole, Roald Amundsen _________ (fly) over the North Pole.

5 I _________ (not travel) by ship until I went to Indonesia last year.

6 Before her final round-the-world flight, Amelia Earhart _________ (break) many records.

7 After Neil Armstrong _________ (walk) on the moon, he became very famous.

8 I _________ (not go) to Shymkent until our holiday last month.​