I. Spelling:
1. A_________ (广告) are an important part of our lives.
2. I did some research on advertisements, and have some very important information to s________ with you.
3. An advertisement provides information and uses p________ language and exciting images to encourage people to buy a product or service or believe in an idea.
4. A commercial advertisement is one which someone has paid for to p_______ a product or service.
