26. B Second
27. A programs
28. D computers
29. A work
30. A to think
V
31. You can use this computer, can't you
32. I wish I could remember the answers to these questions
33. Nam said I had to go to Ha Noi the following day
34. It takes Nga 4hours a day to practice English with her friends
35. It is raining heavily, so we take our umbrellas
VI
36. Do you mind if I borrow your car
37. Tom is always going home late so his mother is angry
38. It is necessary for you to practice English every day
39. Compost can be made from household or garden waste
40. Flight 710 to Chicago takes off in ten minutes