1. If something became two times bigger than it was, it ....
2. A ..... is a room or building for books.
3. A person who writes a book or a document is an .....
4. Someone who can do some things without having to learn them first has .....
5. A person who worked for many years and then stopped is ....
6. An ... is a long and carefully organized trip.
7. A ..... is something very important you say or write.
8. A person who makes the drawings for a building is an a....
9. A .... is a person who studies or does research in science to find out how things work.
10. A ..... is the official leader of a country, government, or a large organization.
