It’s impolite to make 　　　　　(noise) while eating noodles.
By reading this article, we can learn about table 　　　　　(manner).
At that time, all the questions 　　　　　(crowd) my mind.
When I first ate in a 　　　　　(west) restaurant, I didn’t know what to do.
We should speak to old people 　　　　　(polite).