Write if Given Phrase is Used in Formal or Informal letter

We write informal letters to friends, family members and people that we know well, for example, a letter to an old school friend.

We write formal letters to people that we don’t know well, for example, a letter to the local council to inquire about childcare facilities.
Note: Learn writing formal and business letters to people

Say whether the following phrases come from informal or formal letters. Write either ‘Informal Letter’ or ‘Formal Letter’ next to each one.