71. be ashamed of 以…为羞耻

a) I behaved badly yesterday and I am ashamed (of myself) now. 我昨天表现不好，我现在感到很惭愧。

72. assure sb of sth 向…保证, 使…确信

a) I assure you its quality. 保证质量

73. attach (to) 缚, 系 ,结

a) We should attach primary importance to the development of economy.我们要把发展经济的工作放在第一位。

74. make an attempt at doing sth (to do sth) 试图做…

a) If you make an attempt to do something, you try to do it, often without success.

75. attend to (=look after) 关注；注意：

a) We'll attend to that problem later.

b) 稍后我们将关注那个问题

c) The staff will helpfully attend to your needs.

76. attend on(upon)(=wait upon, serve) 侍候

a) attend on one's master 侍候主人

77. attitude to/ toward …对…的态度/看法

a) People's attitude towards the skyscrapers varies widely. 人们对这些摩天大楼的态度很不相同。

78. attribute…to…(=to believe sth to be the result of…)把…归因于

a) David attributed his company's success to the unity of all the staff and their persevering hard work.

b) 大卫说他们公司之所以获得成功是由于全体员工的团结和坚持不懈努力工作的结果。

79. on the average (=on average, on an average) 平均

a) On average, American firms remain the most productive in the world.

b) American shares rose, on average, by 38%.

80. be aware of (=be conscious of , beware)意识到

a) I was not aware of the fire. 我没有意识到火。