根据句意，用括号中所给单词的适当形式填空。

1. It's impolite to make _____ (noise) while eating noodles.

2. By reading this article, we can learn about table _____ (manner).

3. At that time, all the questions _____ (crowd) my mind.

4. When I first ate in a _____ (west) restaurant, I didn't know what to do.

5. We should speak to old people _____ (polite).