题目内容：

 

1.______________(熬夜) too much is not good for our health.

2.Shall we invite the famous singers to our food ____________(节日)？

3.The pollution in this town used to be very serious, people _____________ saw the blue sky ____________(既不……也不) breathed fresh air.

4.Yu Dan ________________ (被看作) one of the best speakers in our country.

5.We should study hard and _________________(为……作贡献) to our country in the future.