IV. Read the following passage, and answer the questions that follow THE GREAT WALL OF CHINA In China, there is a wall that is 1,500 miles long. It is called the Great Wall of China. It winds uphill and down, through valleys and mountains. It was made by hand. The Great Wall of China was built from 246 to 209 BC. The people of China made it to keep out their enemies. There are watch towers all along the way. The Wall is made of brick and earth. It is high and wide on top. People can walk along the top as if it were a road. No other defense line has ever been made as long as the Great Wall of China. Answer the questions: 21. Where is the Great Wall located?___________________________________ 22. How long is it? ____________________________________________________ 23. When was it built?______________________________________________ 24. What is the purpose of the Great Wall?__________________________________ 25. What is it made of?____________________________________