74.With the development of agriculture，the peasants’ i _____________has greatly increased.

73.I couldn’t get through to the teacher. Maybe I d__________ the wrong number.

72. He kept on trying and at last he got s___________.

71. A person who is m___________ ill is one whose mind is unwell.

70. Do it now. O____________ , it will be too late.

69. He's gone to hospital in Shanghai for special t_____________.

68. The boy looked at his father h________ because he thought his father had brought him a present.

67. You should judge a book by its c_____________ , not by its cover.

66. On seeing the snake, the little girl s_____________.