I attached a covering letter to the package.

The post office returned the package as a dead letter.

I prefer writing in block letters because they are easier to read.

I sent an air letter to my friend who lives overseas.

The police successfully defused a letter bomb that was sent to the government office.

The letter carrier delivers mail to our house every day.

Her performance was letter-perfect.

I carefully reviewed the letter of referral before recommending the candidate for the position.

After thoughtful deliberation, the candidate submitted a letter of intent to express his enthusiasm for the project.

Please remember to use a capital letter at the beginning of a sentence.