Remember to mail this letter.

I found a letter in the mailbox.

The main purpose of this project is to improve efficiency.

It is important to maintain a healthy lifestyle.

Regular maintenance is essential to keep your car running smoothly.

The majority of the students voted in favor of the new school policy.

He is a male student.

Effective management is crucial for the success of any organization.

Mankind has made significant advancements in technology.

The maple leaves turned a beautiful shade of red in the autumn.