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20. flights
21. information
22. increasingly
23. invention
24. unnecessary
25. musicians
26. convenience
27. difficulties
28. produce
29. beauty
30. preparation
31. reasoned
32. celebration
33. happiness
20. flights
21. information
22. increasingly
23. invention
24. unnecessary
25. musicians
26. convenience
27. difficulties
28. produce
29. beauty
30. preparation
31. reasoned
32. celebration
33. happiness
1 have been
2 was introduced
3 information
4 costly
5 exploration
6 careless
7 being look at
8 had just had
9 was built
10 to come back
11 listening
1. The managing director changes his mind and backs out the project.
2. It took me half an hour to figure out the answers for the question.
3. It’s high time you get rid of all your old clothes.
4. I didn’t know Van Anh went in for badminton, too.
5. We are sorry to informed you that your service no longer needed.
6. The employers are regretted have to dismiss several of his staff
7. We had done away with a lot of paperwork when we got two computers.
8. Some people think that watching television do more harm than good.
Đáp án: information