1. A person who writes poems is called a—

2. A person who writes books is called an—

3. A person who speaks many languages is a—

4. A person who cannot read or write is—

5. A person who loves books is a—

6. A person who studies stars and celestial objects is an—

7. A person who studies plants is a—

8. A person who studies animals is a—

9. A doctor specializing in heart diseases is a—

10. A person who looks at the positive side of life is an—

11. A person who expects the worst is a—

12. A place where books are kept for reading or borrowing is a—

13. A place where aircraft are kept is a—

14. Government by the people is called—

15. Government by a king or queen is called—

16. Something that cannot be avoided is—

17. Something that can be heard is—

18. Something that cannot be read because of poor handwriting is—

19. A person who loves mankind is a—

20. A person who knows and uses only one language is—