Do all English letters begin with dear? What if it's addressed to a stranger of the opposite sex who has never met before?

1, you can start with Dearsier/Madam without knowing who the other party is;

2. Write a letter to a committee or office, starting with the DearXXX committee/organization/office;

3. When writing a letter to a teacher or a work agent, you can start with DearprofffersRxx/DearSir/DearSir.

Extended data:

Synonym of dear professor: hello professor.

Hello, professor

Pronunciation: English [h? l？ Public relations? fes？ (r)]？ Beauty [h? lo？ Public relations? fes？ (r)]？

Interpretation: Hello, Professor.

Grammar: The reason why people choose hello instead of dear is to create a relaxed and friendly atmosphere, so that it is easier to get the response you want.

Example:

Rupert. Hagrid:? Hello? Professor. ? Me? No? Do you see it? You ? Harry? This? Is it? Professor? Chilowell? Is it? Yours Defense? Objection? That? Darkness? Art? Teacher. ?

Rubeus hagrid: Hello, Professor. I didn't see you just now. Harry, this is Professor Quirrell, the defense against the dark arts teacher at Hogwarts.