Perfect Tenses. Exercise8.
Поставьте глаголы в скобках в правильную форму.
1. Specialists (to determine) the main properties of the substance this month.
2. These machines (to produce) by our plant since last year.
3. The delegation (to meet) by 3 o’clock tomorrow.
4. We just (to carry out) the test successfully.
5. I never (to visit) this museum.
6. The plane already (to leave)
7. When I came they (to tell) all the important information.
8. My sister (to look) through the morning newspapers for 30 minutes.
9. He never (to read) the books by Agatha Christie.
10. John (to visit) by his group mates by yesterday evening.