Use these tips when writing a formal letter
1 Be concise. State the purpose of your formal letter in the first paragraph and don't veer from the subject. ...
2 Use the right tone. ...
3 Proofread. ...
4 Use proper format and presentation. ...
5 Heading. ...
6 Inside Address. ...
7Salutation. ...
8 Body.
Answer:
In the 19th century, Modern Greek became the official language of the Kingdom of Greece.
Explanation: