"Advertising goes down the street with us; it's on trains, planes, and buses.”
Answer:
1. Although he was wealthy, he was still unhappy.
2.Because my coffee was too cold, I heated it in the microwave.
If a person is writing a formal letter, then his letter should contain some of the following elements: Proper greetings/salutations and reason for writing etc.
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What is Letter Writing?</h3>
A letter writing defined as a use of letters to convey opinions or feelings to anyone who live far away from us. The letter writing is divided into two parts Informal and Formal letter.
In case of letter writing, people need to write the proper address of sender, greetings and the main thing: the reason of writing this letter.
Learn more about Writing, refer to the link:
brainly.com/question/24623157