Contens:

I. Greetings:

   1. Informal:
       - Hello.
       - Hi.
       - Hey.
       - Hey yo.
       - What's up.
       - How're you doin'?
       - How're things?

  2. Formal:
      - Good morning, afternoon, evening.
      - Good day.
      - How do you do?

II. Apologies:

  1. Informal:
      - I'm sorry.
      - I'm so sorry.
      - I'm terribly sorry about that.
      - My dad. Sorry.

  2. Formal:
      - I am sorry for what happened.
      - I am truly sorry for the inconvenience.
      - I apologize for the trouble I caused.
      - My apologies.

\(\Rightarrow IN \, \, \, THE\, \, \, TEST\)
1. A: How do you do? My name's Andrew.
   B: ........... . I'm Alex.

   A. How are you doing?
   B. Hi!
   C. Hello.
   D. Good morning!

2. A: I'm truly.........for what happened.
    B: Never mind.

     A. sorry.
     B. apologizing
     C. regretting 
     D. All are correct