WSR Adv.1 U4-6

4. From one end or side of something to the other.
5. The number 1,000,000.
8. Moving first in one direction and then in the opposite one.
10. (of a slope) rising or falling at a sharp angle
11. To keep someone or something safe from injury, damage, or loss.
13. The people living in one particular area or people who are considered as a unit because of their common interests, social group, or nationality.
14. Something that has never been made before, or the process of creating something that has never been made before.
15. To cause to fill or become covered with water, especially in a way that causes problems.
16. A route or track between one place and another, or the direction in which something is moving.

1. Someone who travels to places where no one has ever been in order to find out what is there.
2. From, existing in, serving, or responsible for a small area, especially of a country.
3. Inside or not further than an area or period of time.
6. To move air into and out of the lungs.
7. Showing or expressing thanks, especially to another person.
9. Of or from a long time ago, having lasted for a very long time.
10. To drink, taking only a very small amount at a time.
12. Something that happens or exists because of something else.
13. A large valley with very steep sides and usually a river flowing along the bottom.