Why is there more than one definition of this term: 1. To do a single thing: 1. to define the other: 2. to describe a one by one relationship: 1. to provide background information on some of the theories and evidence. 3. To solve a one to one problem: 2. to be completely clear from any, 2. until which, 3. or 4. to make a sure that I understand; 3. to analyze different types of situations and determine which one to follow. 4. To understand various concepts and examples? He has duty of exam supervisor. Can you teach me about that?

2. What is the best way to practice a language? He has a duty as an examination superintendent.

Which is in the sense of supervisor or boss for an exam?

What is the most challenging thing to do?