四、用所给单词的适当形式填空。（共20小题，每小题1.5分，共30分）
61. The secretary reminded me of his______________ (arrive).
62. When a boy leaves college and begins to earn money, he can live a life of ______________ (independent).
63. I like to take some ______________ (energy) exercise at weekends.
64. I have hardly enough ______________ (strong) left to move my feet.
65. I had to explain the reasons to satisfy his ______________ (curious).
66. I’m ______________ (tire) of this kind of food. Can’t we change a different one?
67. You were wrong to take the car without ______________ (permit).
68. The boy sings so well that he dreams of being a ______________ (music) in the future.
69. I was most ______________ (grate) to John for his kindness of sending me the book immediately.
70. Money does not always bring ______________ (happy).
71. She ______________ (frequent) goes out for a trip.
72. After her heart operation, ______________ (gradual) she recovered her health.
73. Can you change the ______________ (spell) of the word into the correct one?
74. He is known as a ______________ (report) throughout the country.
75. No matter how ______________ (power) the enemy seems, we must fight against them to the end.
76. He was indeed a carpenter, and spent his spare time carving small ______________ (wood) toys for his children.
77. When she is offered ice-cream or pie, she always chooses the______________ (form).
78. You’re the ______________ (slavery) of money.
79. We enjoyed the ______________ (magic) evening beneath the bright stars.
80. I kept on struggling forward, even though I knew it was ______________ (hope).