Study the vocabulary about making introductions.
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.

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.