Помогите!!!пожалуйста!!!!
Употребите глаголы, данные в скобках, в Present Perfect, Past Perfect или Future Perfect
1. I (hear) that story before. 2. Polly is afraid that her husband (lose) her car keys. 3. She never (see) this film. 4. The teacher corrected the exercises which we (write). 5. We knew that he (be) there several times. 6. She said she (look) everywhere for the magazine. 7. I am sure they (complete) the new underground station by summer. 8. Sally says that before she leaves she (do) every sights in Kiev.