21．Mothers and fathers all over the world teach their children manners． Other children may have manners that are not like yours． There are all kinds of manners．
Many years ago，
children who had good manners were seen and not heard． They kept quite quiet if grown-ups were talking． Today， well-mannered children have more freedom．
Sometimes good manners in one place are bad manners in other places．
Suppose you are a visitor in the land of Mongolia． Some friends ask you to eat with them． What kind of manners do they want you to have？ They want you to give a loud "burp" after you finish eating． Burping would show that you liked your food．
In some countries， if you give a loud burp， you are told to say "Excuse me， please．" In many places， people like to eat together． But in some parts of Polynesia， it is bad manners to be seen eating at all． People show good manners by turning their backs on others while they eat．
What are manners like in an East African town？ The people try not to see you． They are being polite．You may see a friend． He may not see you at all． If you are polite， you will sit down beside him． You will wait until he finishes what he is doing． Then he will talk to you．
Suppose you visit a friend in Arabia． You should walk behind the other tents until you come to his tent． If you pass in front of the other tents， you'll be asked into each one． The people will ask you to eat with them． And it is bad manners if you say no．
Manners are different all over the world． But it is good to know that all manners begin in the same way． People needed ways to show that they wanted to be friends．
（1）What is the best title of the passage？（no more than 10 words）
（2）How do you understand the underlined sentence in Paragraph 2？（no more than 10 words）
（3）In Mongolia， what action is thought to be a good manner according to the passage？（no more than 6 words）
（4）What are well-mannered people expected to act in some parts of Polynesia during eating？（no more than 10 words）
（5）Traditionally， what is a good manner during eating in China？（no more than 20 words）
