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4th Grade reading comprehension · History · Read the passage, then circle the best answer.
The Great Wall of China is one of the most famous structures in the world. It is not one single wall, but many walls built over about 2,000 years.
Early walls were made of packed earth and wood. Later, during the Ming dynasty, builders used bricks and stone to make the strong, winding wall that many visitors see today.
The wall was built to protect China’s northern lands from raids. Soldiers kept watch from towers and sent signals with smoke by day and fire by night.
Today the Great Wall is a UNESCO World Heritage Site, and millions of tourists walk along its ancient paths every year.
Words to know: dynasty: a family of rulers who govern a country for a long time · raid: a sudden attack
1. B (detail) 2. A (detail) 3. A (detail) 4. B (main idea)