The Great Wall is one of the most famous historic sites in China, running about 4,300 miles long. Observe the picture at the right. Why did the early Chinese build fires at the various watchtowers along

The Great Wall is one of the most famous historic sites in China, running about 4,300 miles long. Observe the picture at the right. Why did the early Chinese build fires at the various watchtowers along the wall?

1.to keep warm
2.to be able to read in the evening
3.to communicate with the other watchtowers
4.to cook their food

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The Great Wall is one of the most famous historic sites in China, running about 4,300 miles long. Observe the picture at the right. Why did the early Chinese build fires at the …

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