Задание: In each of the following sentences, there are two verbs in brackets. Put one in the Past Simple and one in the Past Perfect

When schoolchildren _______ (finish) their lessons, they _____ (go) home.

My father took me to Almaty last year. He ____ (be) there as a student, so he ____(know) his way around.

When I got to school, I _______ (understand) that I____ (forget) my English texbook.

ПОМОГИТЕ ПОЖАЛУЙСТА!