have passed; 

 will have passed;

 had passed;

 are passing.

is sitting;

 were sitting;

 was sitting; 

 will be sitting.

 connection;

cooperation;

collection  

link

 researcher

scientists;

inquirer.    

 investigator

Its principal function is to express an utterance. 

 Its principal function is to express our thoughts in accordance with the grammar of our language; 

 Its principal function is to coordinate our actions and exchanges with others in our social group;

Its principal function is to manipulate the social environment

 Because a language is used for communication;

Because “social” and “cultural” are interrelated ideas; 

 Because people rely on language;    

Because a language normally functions in a social context. 

Conferences give an opportunity to present your work, to get acquainted with the new ideas and to get new information.

Conferences give the opportunity to relax and enjoy the company;  

Conferences focus on the presentations and lectures; 

 Conferences give the possibility to exchange thoughts and opinions on a certain topic;

Because the world has changed greatly; 

 Because there is much more information and more space is needed for the interpretation of the results.

 Because science is complex;

 Because mankind develops rapidly; 

 To complete the paper.

 To make a presentation; 

 To ensure consistency with the style, referencing, etc.; 

To get a permission to write a paper; 

It is the introduction because it prepares the listener for the body, captures their attention and lets them know what they are going to hear in the presentation;

It is the outline of your talk because it helps the audience to follow it

 It is the body of the presentation because it is clearly organized with the main points highlighted;

It is the conclusion because it sums up the main points;