An ____ is of great importance when people meet for the first time. However, there are some ____ and social differences. It is ____ to know about these differences. The British are relatively formal. They usually shake hands, smile and say, ‘Hello’ when they meet people for the first time. Often, it’s a good idea to start by ____ about weather, traffic, etc. Americans are less formal. They don't always feel they need to shake hands when meeting strangers. Sometimes they just smile or wave and say, ‘Hi’. Americans like to call others by their first names after they meet, which is a kind and friendly ____.