1. Maufacturing is Canada’s most important economic activity, ____17 percent of the workforce.

2. The primary source of energy for tropical cyclones is the latent heat released when ____

3. ____ is rooted in experiments in iron and steel conducted in the nineteenth century.

4. The chief sources of B12,a water-soluble vitamin ____ stored in the body, include meat, milk and eggs.

5. ____ 363 miles between the cities of Albany and Buffalo in New York State, the Eric Canal helped link the Atlantic Ocean with the Great Lakes.

6. Geometrically, the hyperbolic functions are related to the hyperbola, ____ the trigonometric functions are related to the circle.

7. Hail is formed when a drop of rain is carried by an updraft to an altitude where ____ to freeze it.

8. The soybean contains vitamins, essential minerals, ____high percentage of protein.

9. ___ need for new schools following the Second World War that provided the sustained thrust for the architectural program in Columbus, Indiana.

10. The first inhabitants of the territories ____Canada came across the Bering Strait and along the edge of the Arctic ice.

11. In addition to ____a place where business deals are made, a stock exchange collects statistics, publishes prices quotations, and sets rules and standards for trading.

12. According to United States criminal law, insanity may relieve a person from the usual legal consequences____.

13. Virtually ____ species have biological clocks that regulate their metabolism over a 24-hour period.

14. The imagist movement in poetry arose during the second decade of the twentieth century ____against romanticism.

15. The role of the ear is ____ acoustic disturbances into neural signals suitable for transmission to the brain.