1 . He i__________ all the “No Smoking” signs and lit up a cigarette.

2 . This autumn, 6000 people will p______ in the first period of the project. （根据首字母单词拼写）

3 . The start of a new year is a good time to ______(反思) on the many achievements of the past. （根据汉语提示单词拼写）

4 . Some advertisements c__________ of pictures or words of experts to show people how good the products are.

5 . Many scientists c__________ greatly to the development of society in the past.