Exercise 13. Underline the correct tense

1. Liz and I are good friends. We know/ have known each other for four years.

2. Sarah is very tired. She has been working/is working hard all day.

3. “Where is John?” “He’s upstairs. He does/is doing his homework.”

4. I can’t go to the party on Saturday. I am leaving/have been leaving for Spain on Friday night.

5. Jane has finished/is finishing cleaning her room, and now she is going out with her friends.

6. I didn’t recognize Tom. He looks/is looking so different in a suit.

7. I don’t need to wash my car. Jim washes/has washed it for me already.

8. Ian has been talking/is talking to his boss for an hour now.

9. Claire’s train arrives/has arrived at 3 o’clock. I must go and meet her at the station.

10. “Would you like to borrow this book?” – “No, thanks. I have read/have been reading it before.”

Exercise 14. Correct the mistakes.

1. They have been to the shops. They’ll be home soon.

2. Joe plays in the garden at the moment.

3. I am going to work by car every day.

4. The builders finish the block of flats already.

5. He has been breaking his arm.

6. Sam have just finished reading a very interesting book.

7. Water is boiling at 100 degrees Celsius.

8. John is living here since 1986.

9. I study this subject for five years.

10. Who has use my scissors?

WRITING

Write the composition (150-200 words): “How do you use computer in your studies and in your free time?”

UNIT 2

COMPUTER ARCHITECTURE

Vocabulary Bank Unit 2

Task 1. Read, write the translation and learn the basic vocabulary terms:

1. adjacent

2. appointment

3. binary system

4. bottleneck

5. cache (n)

6. cache hit

7. capacity

8. coat (v)

9. coherency

10. computer motherboard

11. crash (v)

12. decimal system

13. electricity supply

14. external

15. format (v)

16. handheld (adj)

17. headphones

18. CNIC

19. loudspeaker

20. mainframe (n)

21. multimedia feature

22. multi-tasking

23. nuclear research

24. pen-based (adj)

25. storage medium

26. portable (adj)

27. power failure

28. power cord

29. price (v)

30. processor (n)

31. rotate (v)

32. to attach

33. slow up (v)

34. system bus

35. speed up (v)

36. suitable

37. personal digital assistant

38. swipe cards

39. to measure

40. track (n)

41. versatile (adj)

42. versatility (n)

43. viewable

44. write-back cache

45. write-through cache