bài 1:

1.a will move

2.d can hold

3.c because

4.c both A and B are correct

5. a main frame

6.c rom

7. c tell

8. b education

9. a of

10.b appeared

11 d.equalize

12 a.design

13 a.with

14,.d nor

15.d mouse

16.b peripheral

17.connect

18.d represents

19..b have completed

20.c sequentially

21.c optical disks

22.c secondary memory

23.c canread only

24.a avery popular storage device

25.c to store both things mentioned in a and b

26.b use the same technology

27.c optical scanning techniques

28.a 200 books of 1000 pages

29.c combines a and b

30. c akind of input divice

31.c personal computer

32.b.operating system

33.a press and release it rapidly two times

34.c pull it towards you

35.b on the taskbar

36.c when you close the program window, the program name appear on the task bar

37.a double-click the message title

38.b the inbox

39.a in plain text format

40.b A wed browser

41.d Wed address

42.d a hand icon

43.b CLick forward

44.a click the search button

45.a Type it into a computer

56.d A network

47. a server

48. share the folder containning the file

49.a Using a network is more dangerous than using any other communication system because of hidden dangers

50.b portable printers