1. Recently pop-rock music has decreased in **popularity** (popular).

2. Your money will be refunded if the goods prove to be **unsatisfactory** (satisfy).

3. The **preservation** (preserve) of old buildings should be taken into consideration.

4. It is tiring to talk to such a **narrow** (narrow) -minded person.

5. They did everything possible to **strengthen** (strong) the police force.

6. Smoke from cigarettes can even do harm to **nonsmokers** (smoke).