1. Mark Twain based the story ______ his experience in the West.

2. We just rested ______ a short time.

3. Don't put ______ until tomorrow what you can do today.

4. John Harcourt was ashamed ______ his father.

5. I prefer coffee ______ tea.

6. If you don't know the meaning of the word, look it ______ in the dictionary.

7. Washington State is famous ______ its apples.

8. Was your choice of research topic acceptable ______ your instructor.

9. People who are afraid ______ heights are called acrophobes.

10. Water is essential ______ all life.

11. Were you aware ______ the regulations against smoking in this area?

12. Tepees are characteristic ______ the Indian tribes of the Great Plains.

13. Will this office be adequate ______ your company's need?

14. I'm not familiar ______ that song.

15. One meter is approximately equal ______ a yard.

16. This movie is based ______ a true story.

17. This summer, he will be eligible ______ a three week vacation.

18. What he said is contrary ______ common sense.

19. The art museum is located next ______ the museum of natural history on State Street.

20. Many vegetables, including tomatoes and corn, are native ______ the New World.

21. This style of architecture is typical ______ the Colonial period.

22. Oxygen, fuel, and heat are all necessary ______ combustion.

23. This apartment would be too crowded for two people, but it is perfect ______ one.

24. This variety of seed is inferior ______ the type I planted last year.

25. This variety of seed is superior ______ the type I planted last year.