79.Life belongs to a person only once, so I hold the view that being healthy is more important than being w___________.

78.G__________, he began to understand.

77.One of the best ways for people to keep fit is to d_________ healthy eating habits.

76.Paper making began in China and from here it s__________ to North America and Europe.

75.I __________(吃惊，惊奇) at your ignorance.

74.He was so poor that he had to earn his _________(船费) by doing jobs on the ship.

73.What I know about it is ___________(有限).　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

72.If you want to learn skating, you must learn to keep __________(平

衡) yourself.

　　　　　 根据题中所给的汉语或首字母写出符合句意的单词的正确形式。

71.Social__________(风俗) are different in different countries.