15. Make sentences using the following prompts. Example: this problem | for too long They have been trying to solve this problem for too long. 1. the presentation | several days 2. the customers | twenty minutes 3. this conference | two weeks 4. this fax | 7 o'clock 5. this subject | three terms 6. the lecture | two hours 7. the performance | several months 8. training | one year

1. The presentation has been lasting for several days. 2. The customers have been waiting for twenty minutes. 3. This conference has been going on for two weeks. 4. This fax was sent at 7 o'clock. 5. This subject has been taught for three terms. 6. The lecture lasted for two hours. 7. The performance has been running for several months. 8. The training has been lasting for one year. **Перевод на русский:** 1. Презентация длится уже несколько дней. 2. Клиенты ждут уже двадцать минут. 3. Эта конференция продолжается уже две недели. 4. Этот факс был отправлен в 7 часов. 5. Этот предмет преподается уже три семестра. 6. Лекция длилась два часа. 7. Спектакль идет уже несколько месяцев. 8. Обучение длится уже год.