26. He often _____ of his learning before others.
A.tells
B.speaks
C.boasts
D.mentions

27. They were almost out of _____ as they climbed to the top of the mountain.
A.smell
B.oxygen
C.air
D.breath

28. It turns out that the young lady is the only _____ for the teaching post.
A.alternative
B.candidate
C.representative
D.substitute

29. He is very _____ of social work.
A.able
B.enable
C.capable
D.potential

30. They are united as one to fight for the _____ of justice.
A.course
B.career
C.cause
D.duty

31. Carelessness is _____ of this young fellow.
A.characteristic
B.personal
C.apparent
D.consistent

32. The witness gave the policemen an important _____ to the case.
A.clay
B.glue
C.fact
D.clue

33. The roof _____ under the weight of the heavy snow.
A.collapsed
B.broke
C.fell
D.destroyed

34. The pupil knows what water is _____ of.
A.formed
B.constituted
C.consisted
D.composed

35. It is so noisy outside that I can not _____ on what I'm reading.
A.direct
B.attend
C.concentrate
D.impose

36. Some scientists don't want to draw a(an) _____ that there is no life in other planets.
A.argument
B.proposal
C.discovery
D.conclusion

37. Being a teacher, she is always _____ of her own responsibility.
A.clear
B.certain
C.proud
D.conscious

38. She is well respected among the students for she is always _____ of them.
A.concerned
B.considerate
C.careful
D.cautious

39. Jack is a very talkative boy. On the _____, his brother is rather silent.
A.contrast
B.comparison
C.opposite
D.contrary

40. It is the end of this year. And New Year is around the _____.
A.turn
B.time
C.schedule
D.corner

41. Children tend to be _____ about the mysteries of nature.
A.curious
B.confused
C.interested
D.attracted

42. Excessive drinking does _____ to one's health.
A.destruction
B.ruin
C.bad
D.damage

43. The policemen asked the witness to describe the criminal in _____.
A.exactness
B.detail
C.concretness
D.definition

44. The boss _____ Tom from the post of sales manager for his carelessness.
A.drove
B.deprived
C.dismissed
D.denied

45. We must teach children how to _____ right from wrong.
A.classify
B.distinguish
C.speak
D.describe

46. The English teacher _____ upon the new word for quite a few minutes.
A.considered
B.defined
C.stressed
D.dwelt

47. It is _____ to become angry about such a trifle matter.
A.tragic
B.ridiculous
C.grateful
D.realistic

48. Whatever he is faced with danger, he always _____ calm.
A.seems
B.remains
C.looks
D.appears

49. If you do not _____ by the regulations, you will get into trouble.
A.adhere
B.stick
C.insist
D.abide

50. Travel will _____ you with new customs.
A.mix
B.contact
C.acquaint
D.compare