Many years ago, children who had good manners kept quiet if their parents were talking with other persons. Today, well-mannered children have more freedom.  Sometimes good manners in one place are bad manners in other place.  Suppose you are a visitor in the prefix = st1 /landofMongolia. 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 will show that you like 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 their good manners by turning their back on others while they eat.  What are good 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're 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 tents until you come to his tent. If you pass in front of the other tents, you will be asked into them. The people will ask you to eat with them. And it is bad manners if you say no. In Arabia it is bad manners   _   .
to walk behind the tents to visit a friend to refuse to sit down to say no if you're asked to eat