Добрый день, помогите пожалуйста с английским

1. The decrease in cost of microelectronic devices ... about changes in the way people and computers interact since the beginning of the century.

a) brought b) have brought c) has bought

2. My friend ... a new PC recently and he is very happy now, because it gives him a lot of opportunities for work.

a) buy b) bought c) has bought

3. I'm not going to surf the Internet today. I ... all necessary information some time ago.

a) find b) found c) have found

4. Our group mates ... English on-line this week yet.

a) haven't practiced b) didn't practice c) hasn't practiced

5. ... you brother ever ... Photoshop?

a) does use b) has used c) is used

6. When ... Alex ... icons and music from the Internet last time?

a) does download b) did download c) has downloaded

7. I haven't seen my cousin ... 2005.

a) since b)from c) for

8. I ... computer literate by the age of 18

a) became b) have become c) had become

9. When we came home, my father already ... on-line banking

a) did b)was doing c) had done

10. The children .. games on-line yet, when their mother came home.

a) haven't played b) hasn't played c) hadn't played

11. ... you every opportunity to master English by the time you left the University?

a) did use b) had used c) have used

12. Perhaps my brother ... computer business by the time he is 35

a) will have started b) will have start c) will start

13. Mary's parents ... a new laptop to her when she passes all her exams with excellent marks.

a) present b) presented c) will have presented

14. Probably everyone ... computers that fit into your hand by 2020

a) will have b) will be having c) will have had

15. I hope books and newspaper ... by the 22nd century.

a) haven't disappeared b) won't have disappeared c) hadn't disappeared

16. By what time ... you that website?

a)will make b) will have make c) will have made

17. Modern PCs do amazing things: they ... even understand spoken language!

a) can b)could c) may

18. Nowadays computers ... follow instructions and play mathematical games

a) could b) can c) will be able to

19. A lot of musicians and music companies were not happy, because people ... get their music free in the Internet.

a) can b) will be able to c) could

20. Nowadays everybody ... be computer literate

a) must b) had to c) to be to

21. ... he ... make a report about new computer- based technologies yesterday?

a) docs, have to b) did, have to c) is, have to

22. I think you ... change your old PC for a new model of a laptop - it's more convenient to use.

a) must b) should c) can

23. When your parents ask you where you were last night, you ... tell them lies.

a) shouldn't b) mustn't c) оба варианта возможны

24. Before I entered the University, I ... surf the Internet and find necessary information

a) couldn't b) can't c) won't be able to

25. ... I borrow your floppy disk? - Of course, I have some at home.

a) must b) may c) should

26. The train ... to arrive at 5 o'clock.

a)be b)is c) are

27. I have only ... computer at home.

a) one b) two c) three

28. I don't like political programmes, but I like musical ...

a) one b) ones c)оба варианта возможны

29. Internet is the greatest source of information and the most popular ...

a) one b) ones c) оба варианта возможны

30. My mother is the best friend for me and a very fair ...

a) one b) ones c) оба варианта возможны