1) — Helen looks very tired.
— Yes,
she / work hard

since 8:30 this morning.
2) Look!
somebody / break

that window!

3) you / ever / work

in a cafe?
4)Patrick is really tired.
he / be awake

since four o'clock this morning.

5)Helen and Ed / be married

for three months.

6)I / not / see

my friend since last week.
7) Is it still raining? No,
it / stop
8)He's a very famous writer.
he / write

about 10 novels.
9)Sorry, I'm late. How long
you / wait

for me?
10) I'm really hungry!
I / not / eat

anything since morning.
11)I'm so nervous!
we / wait

for our flight for an hour.

С течением времени экология нашего города становится всё хуже и хуже. А всё из - за чего? Причиной тому является большое количество производственных предприятий, выхлопные газы машин и могое другое. Люди нуждаются в повседневной жизни в этих вещах, жертвуя своим здоровьем и экологией. Это может печально отразиться на будующем. По- этому, что бы избежать этой проблемы, можно организовать сообщества, например состоящих из школьников и студентов, которые будут убирать мусор, тем самым приложив усилия в по улучшению экологии. Также возможно и проведение акции по защите природы. Я хочу видеть экологию нашего города процветающей, как в прямом так и в переносном смысле. Ведь от этого зависит дальнейшая жизнь всего человечества.

1. The pupils ( discussed) this problem yesterday. 2. The pupils (were discussing) this problem the whole evening yesterday. 3. They  (were discussing) this problem from three till five o'clock. 4. They (were discussing) this problem at four o'clock yesterday. 5. They (were discussing) this problem when I came in. 6. She ( learnt) a poem yesterday. 7. She (was learning) a poem at five o'clock yesterday. 8. She (was learning) a poem from five till six o'clock 9. She (was learning) a poem when mother opened the door. 10. She (was learning) a poem the whole day yesterday. 11. I (did not to see) him yesterday. I ( saw) him two days ago. 12. She (was not  writing) a at seven o'clock yesterday. She (wrote) two days ago. 13. Jane (was reading) the magazine from five till six o'clock last evening. 14. He  studied) a rule in the morning last Monday. 15. Last month our team ( lost) the game. 16. what was she ( doing) when the telephone rang? 17. Whom were they ( speaking) to when I met them at the station? 18. They (were having) lunch when the telephone rang 19. Nick (was making) a report at three o'clock yesterday. 20. Mike (was writing) on the blackboard when I came into the classroom. 21. She (was not  sleeping) the whole night yesterday. 22. Who entered the room when you (were watching) television? 23. What were you ( thinking) about when I asked you a question?