Total English - Upper-intermediate - Unit 1 - Lesson 3

to be in contact with someone, particularly by seeing or writing to them regularly

not having been in contact with someone and unaware of their current situation

to be no longer in contact with a friend or acquaintance

to make contact with someone in order to exchange information or to consult with them

a strong desire to do or have something

a person who studies human society, social behavior, and how people interact with each other in groups