中国大学MOOC: Over the centuries, sections of the Great Wall have _________________________________.
举一反三
- 中国大学MOOC: The Great Wall is one long wall built over 2,000 years ago.
- 中国大学MOOC: Who built the Great Wall?
- The Great Wall _____ all over the world.
- 中国大学MOOC: The great wall symbolizes that great achievement can be made with a a common will and __________ .
- 中国大学MOOC: The earliest great Wall was built in the Ming Dynasty.