根据首字母或汉语提示写出单词
71. Courage and religious f________ alone are not enough to win battles.
72. It's difficult to find a ________________ (永久的) cure for this disease.
73. Colours like red c____________ a sense of energy and strength.
74. Tom gave Helen an apple in e_____________ for a piece of cake.
75. Things can easily go wrong when people are under s__________ .
76. You ought to be a____________ of your foolish behaviour.
77. He made a _______ (稳定的) income from his friends and he made friends easily.
78. He is an a______________ man. There's nothing special about him.
79. Lacking __________(设备), we couldn't continue climbing the mountain.
80. I _________ （保证） that if you take this medicine, you'll soon get well.
