Task 3. Выберите соответствующую глагольную форму.
a. 1. Ann and Pat have gone/have been going shopping.
2. The sun had already been rising/had already risen by four in the morning.
3. Alfred has been/has been being in the Military Service for five years.
4. Mr Black had kept/had been keeping a shop before he came here.
5. The play "Pygmalion" has been being/has been very popular with the public for many years.
6. They had worked/had been working hard for one year at English before they could speak it properly.
b. 1. We skied/have skied this morning.
2. His son has been serving/served in the Army since last year. 3. George had been staying/stayed with his friends' for a week before he left. 4. The Secretary has already introduced/introduced Mr Brown to the Manager when we came. 5. It has been snowing/snowed since morning. 6. The children had been playing/played outdoors for two hours before they went to school.