五、单词拼写（每小题1分，共10分）

根据句意及首字母或汉语提示，写出单词的正确形式。

66. My mother is a doctor (医生), and she works in a h______________.

67. Go a___________ this road, and then you can find the police station.

68. The books are f_________. You can take them with no money.

69. The work is not difficult. They can finish it e____________.

70. You should p_______________ $20 for it.

71. We want to ________________(度过) a happy weekend with them.

72. Don’t _________(爬) the tree, Tom.

73. I like the clean _________(空气) in the village.

74. Mr. Zhao comes from the _________(北部) of China.

75. Turn left at the second _________(十字路口) and you will find the hospital.