32. Why are silver coins today not worth face value?
33. What are U. S. silver coins made of?
34. What were the first U. S. coins made of?
35. What is an alloy used to do?
Section C
Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46 you are required to fill in the missing information.
For these blanks, you can either use the exact words you have just heard or write down the main points in your own words. Finally, when the passage is read for the third time, you should check what you have written.
Nine planets move around the sun, but the earth has the best position among the planets. Because it doesnt travel too near or too far from the sun, and it receives the necessary amount of heat and light. The air around the earth keeps out the suns dangerous rays. The sun dries up some of the ocean water, but the air above turns it into rain. Sun, air, and water give us the change of seasons from autumn and winter to spring and summer, when the earth becomes green with vegetation. Without the earths special environment, there would be no life on earth. If we change this environment, we may destroy some of the life on earth.
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