Выберете правильный вариант. СРОЧНО! ДАЮ 30 БАЛЛОВ
Choose the right variant:

1. The soldiers were very tired. They … an indomitable barrier.

a. had been erecting

b. had erected

c. have been erecting

2. The invaders … to ashes many cities before they … .

a. had burnt, stopped

b. has been burning, were stopped

c. had burnt, were stopped

3. We … part in the demonstration for 3 hours already.

a. have been taking

b. has taken

c. took

4. The city … very quickly since it … many years ago.

a. has developed, reappeared

b. developed, has been reappearing

c. has been developing, reappeared

5. Partisan Detachments … all the people by the end of the war.

a. had liberated

b. has liberated

c. liberated

6. My parents … at the Bryansk Arsenal since we … to Bryansk.

a. are working, have moved

b. have worked, had moved

c. have been working, moved

7. They … in the forest for 2 hours before they … to the Partisan Glade.

a. were wandering, had come

b. had been wandering, came

c. wandered, have come

8. He … to work at the Machine Building Plant after he … at the Bryansk Technological Academy for 5 years.

a. began, had been studying

b. has begun, studied

c. had been beginning, studied

9. Why are you late? – I … with my friends on the Pocrovskaya Hill for 2 hours.

a. have been walking

b. have walked

c. walked

10. The students … just the Bowl Mound.

a. have visited

b. had been visiting

c. visited