Раскройте скобки, поставьте глагол в необходимое время (Past Simple либо Past

Раскройте скобки, поставьте глагол в необходимое время (Past Simple либо Past Perfect): 1. I (to study) at a university before I started working. 2. By the time I finished working my friends already (to go). 3. I (to learn) well when I was eight years old. 4. When he returned from his journey he (to tell) me everything about it. 5. I (to forget) my passport and had to return home. 6. I corrected all the mistakes I (to make) in my test.