【小题1】staying up(熬夜) too much is not good for our health. 【小题2】Shall we invite the famous s

【小题1】staying up (熬夜) too much is not good for our health.
【小题2】Shall we invite the famous singers to our food festival (节日)？
【小题3】The pollution in this town used to be very serious, people neither nor saw the blue sky is regarded as (既不……也不) breathed fresh air.
【小题4】Yu Dan donate (被看作) one of the best speakers in our country.
【小题5】We should study hard and 　 (为……作贡献) to our country in the future.

解析：【小题1】本题熬夜作主语，故本句空格处填熬夜的动名词形式staying up。【小题2】本句的含义为我们邀请著名的歌手来参加我们的食物节吗，故本句空格处填节日的名称形式festival。【小题3】本句的含义为这个城镇的污染严重，人们既看不到蓝天，也呼吸不到新鲜的空气，故本句空格处填既不……也不得单词neither nor。【小题4】本句的含义为于丹被视为我们国家最好的演说家之一，故本句空格处填被看作的短语is regarded as。【小题5】本句的含义为我们应该努力学习为我们的国家作贡献，故本句空格处填为……作贡献的单词donate。

感谢回答，我学习了