Помогите, пожалуйста, с английским8. Complete the sentences using the Past Perfect

Помогите, пожалуйста, с английским
8. Complete the sentences using the Past Perfect of the verbs in brackets.
Pattern: When she left, she remembered that she (not to lock the door)
When she left, she remembered that she hadn't locked the door.
l) l was sure that l (to see)___that man before.
2) I asked him why he (to leave)___ the party so early
3) The teacher corrected the exercises which I (to prepare)____

9. Use the Future Perfect instead of the infitnitives in brackets.
I) We are sure that he (to keep)____ his promise
2) _____you (to repair)____ the car by four o'clock?
3) A year from now he (to take)____ his medical examinations and (to begin)____ to practice.