50. Doctors warned against chewing tobacco as a ______ for smoking.
A) relief B) revival C) substitute D) succession

51. When carbon is added to iron in proper ______the result is steel.
A) rates B) thicknesses C) proportions D) densities

52. You should try to ______ your ambition and be more realistic.
A) reserve B) restrain C) retain D) replace

53. Nancy is only a sort of ______ of her husband’s opinion and has no ideas of her own.
A) sample B) reproduction C) shadow D) echo

54. Now that spring is here, you can ______ these fur coats till you need them again next winter.
A) put over B) put away C) put off D) put down

55. There is a _____ of impatience in the tone of his voice.
A) hint B) notion C) dot D) phrase

56. Please ______dictionaries when you are not sure of word spelling or meaning.
A) seek B) inquire C) search D) consult

57. At yesterday’s party, Elizabeth’s boyfriend amused us by ______ Charlie Chaplin.
A) copying B) following C) imitating D) modeling

58. She keeps a supply of candles in the house in case of power ______.
A) failure B) lack C) absence D) drop

59. The group of technicians are engaged in a study which ______ all aspects of urban planning.
A) inserts B) grips C) performs D) embraces

60. The lecture which lasted about three hours was so ______ that the audience couldn’t help yawning.
A) tedious B) bored C) clumsy D) tired