Теория:

Study the vocabulary about making introductions.
  
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Introduction - the action of telling someone another person's name the first time that they meet;
 
Casual - not formal or not suitable for special occasions;
 
Approach - to come near or nearer to something or someone in space, time, quality, or amount;
 
Tenet - one of the principles on which a belief or theory is based;
 
Ensure - to make something certain to happen;
 
Extend - to add to something in order to make it bigger or longer;
 
Insult - to say or do something to someone that is rude or offensive;
 
Remove - to take something or someone away from somewhere, or off something;
 
Renew - to increase the life of or replace something old;
 
Transaction - to do and complete a business activity;
 
Rank - a position in an organization, such as the army, showing the importance of the person having it.
 
Examples:

You'll have to do/make the introductions - I don't know everyone's name.

His casual behaviour was wholly inappropriate for such a formal occasion.

It is a tenet of contemporary psychology that an individual's mental health is supported by having good social networks.

We must ensure that tourism develops in harmony with the environment.
Источники:
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