Употребите глаголы, данные в скобках, в present, past или future perfect continuous. 1. i (to wait) for you for an hour already. 2. how long you (to read) this book? 3. she (to work) for this company for 3 years before she left the town. 4. they (to drive) for 2 hours before they reach the town. 5. she (to study) french since childhood. 6. i (to bake) a cake for an hour before they came. 7. elvis ((to travel) for a week before he returns to london. 8. we (to live) in england for nearly 2 years now. 9. they (not/to study) for 5 months already. 10 how long he (to keep) these papers?