Unit 1 : Greetings and Expressions in English

https://www.youtube.com/watch?v=bdX1D6HNnyw

Using "Excuse me" to Introduce a Question
https://www.youtube.com/watch?v=5XZn4F8bGbM

Saying "Excuse me?" When You Don't Understand
https://www.youtube.com/watch?v=PSxZdq05h9k

Reciprocating a Greeting Using "Too"
https://www.youtube.com/watch?v=m0VU01KJCa8

Acknowledging Information with "Thanks"
https://www.youtube.com/watch?v=mfxC-C27Nco

Formal & Informal Greetings in Movies & TV Shows

https://en.islcollective.com/english-esl-video-lessons/search/Greetings