8 . 阅读下列文本,在空白处填入1个适当的单词(部分空有首字母或中文提示)。
For example, there are public advertisements, which 1 (鼓励) citizens to participate in improving their neighborhood, protecting the environment, and helping other people. Over the last 2 (十年) , the government has sponsored advertisements to 3 (教育)the public on fighting AIDS, saving water, helping the poor, giving up smoking, etc. These advertisements have helped to increase public 4 (知识)about topics that used to be i 5 (忽略)by most people, and this has made our society a better place for everyone.