This document provides information about advertisements and expressing opinions. It defines an advertisement as promoting a product, service, or event through public media. The purpose of advertisements is to persuade people to buy or use what is being advertised. It then gives phrases for expressing opinions like "In my opinion" and "I believe." It also provides ways to agree or disagree with others' opinions, such as saying "That makes sense" when agreeing and "However" or "I'm not sure about that" when disagreeing. Finally, it lists topics for exercises where readers can practice expressing their opinions.