1.was discovered

2.the room is cleaned every day.

3.all flights were cancelled

4.this road is not used very often.

5.the computer is being used at the moment.

6.a new hospital has been built near the airport.

7.you will be asked a lot of questions at the interview.

8.Ann wasn't offered the job.

9.was stolen.

10.has been learnt.

a) A(x)+B(x)=2x²-x³+x-3+x³-x²+4-3x

    A(x)+B(x)=1x²-2x+1

kcj

13. B.would have

14. C.neither

15. C.pollution

16. B.yes,let's

17. B.would go

18. C.haven't you

19. A.yes,I'd love to

20.C.impression

21. B.was recognized

22. B. wouldn't be

23. C.have visited

24. A.on

1.B

2.A

3.D

4.D

5.B

6.A

7.C

8.D

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