Task 5.(Задание 5) Вставьте глаголы в правильной форме.(Past Simple; Past Perfect)

1) I (do) my homework before I (go) to school.
2) Before we (eat), my mother (cook) food.
3) They (train) a lot before they (win) the championship.
4) Before Capitan Cook(go) to the Antarctic, he (be) to Australia.
5) Vivien Leigh (not act) in Hollywood films before she (start) to work there in 1939.