[A] unhappiness [B] heartiness [C] harshness [D] uprightness
54. She packed her bags, then called the airport and made a(n) _____ on the last flight out of Los Angeles.
[A] conservation [B] reservation [C] preservation [D]observation
55. If you are a public figure you can`t afford to be too _____ to criticism.
[A] sensible [B] sensitive [C] rational [D] reasonable
56. His spending on pleasure and luxuries is rather high in _____ to his income.
[A] comparison [B] calculation [C] association [D] proportion
57. I had difficulty in _____ myself from telling her what I thought of her.
[A] restraining [B] retaining [C] reserving [D] restricting
58. The book gives a brief ____ of the course of his research up till now.
[A] outline [B] reference [C] frame [D] outlook
59. Many species of animals have now _____ from the face of the earth.