4. Government has reduced the high price of oils in order to protect the domestic goods from the cheaper imports.

6. Although most birds have only a negligible sense of smell, they have acute vision.

7. Under especially favorable conditions, conifers can grow to spectacular proportions.

8. Proper exercise plays a significant role in the rehabilitation of patients with various back ailments.

9. In calculating the daily calorie requirements for an individual, variations in body size, physical activity, and age should be taken into account.

10. In most places, the edges of the continents slope gradually before making a sharp drop to the ocean floor.

11. Although salmon may travel hundreds of miles from where they were spawned, they will ultimately return there to lay eggs.

12. The epic, which makes great demands on a poet's knowledge and skill, has been deemed the most ambitious of poetic forms.

13. When carbon is added to iron in the proper proportions, the result is steel.

14. The predominant activities in rural societies are those that involve the production of food and raw materials.

15. In literature, caricatures usually contain verbal exaggeration through which the writer achieves comic and often satiric effects.

16. Procedures to eradicate animal diseases may include quarantine, immunization, and even slaughter.

17. The struggle between native peoples and colonial governments has been central to the politics of many Third World Countries.

18. Residents in the area claimed that the smoke and smell from the factory were unpleasant and hazardous to health.

19. Executives must have power in order to control employees who resent discipline and try to avoid doing the work.

20. A higher tax on automobiles will increase the government's revenue by millions of dollars.