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A. preserve B. preservation
16. He has very high __________ of his only son.
A. expect B. expectation C. expected D. expectedly
17. Farmers need to __________ crops.
A. rotation B. rotate C. rotational D. rotationally
18. He doesn't have a job. He is __________.
A. employed B. unemployed C. employer D. employee
19. We have to __________ the natural resources of our country.
A. conservational B. conserve C. conserved D. conservation
20. The industrial __________ will lead to the country's prosperity.
A. develop B. development C. developing D. developed
21. Forests must be managed __________.
A. careless B. careful C. carefully D. care
22. The little boy felt very __________ because his parents did not let him go with them.
A. disappoint B. disappointment C. disappointed D. disappointing
23. Your new dress makes you more __________.
A. beauty B. beautiful C. beautify D. beautifully
24. There are a lot of __________ differences in England.
A. region B. regional C. regionally D. regions
25. The surgeons tried their best to save his life, but unfortunately the operation was __________.
A. success B. successful C. unsuccessful D. successfully
26. __________ waste is one of the causes of air pollution.
A. Industrialization B. Industrial C. Industry D. industrious
27. Mount Vesuvius is an __________ volcano.
A. act B. active C. action D. activity
28. He has been very interested in doing research on __________ since he was at high school.
A. biology B. biological C. biologist D. biologically
29. You are old enough to take __________ for what you have done.
A. responsible B. responsibility C. responsibly D. irresponsible
30. The interviews with parents showed that the vast majority were __________ of teachers.
A. support B. supportive C. supporter D. supporting
31. For __________ reasons, passengers are requested not to leave any luggage unattended.
A. secure B. securely C. security D. securing
32. We are impressed by his __________ to help us with the hard mission.
A. will B. willing C. willingness D. willingly
33. The more __________ and positive you look, the better you will feel.
A. confide B. confident C. confidently D. confidence
34. Many Vietnamese people __________ their lives for the revolutionary cause of the nation.
A. sacrifice B. sacrificed C. sacrificial D. sacrificial