The Great Wall of China is a symbol of China.It has a history____ of more than two thousands years.It is from the east to the _west___ in North China.It is about 4,000 miles __long__ .Chinese people _call___ it "Ten-Thousand-Li Great Wall".
The Great Wall was _wide___ enough for ten men to walk side by side along the highest part.Horses could run along it ,too.
Along the Great Wall there were _some___ watchtowers.Long _ago___ ,the soldiers kept watching for the enemy in the watchtowers day and night.They made fire on the towers to __alert/warn__ each other when the enemy came.
As an old building,the Great Wall of China is __famous__ all over the world.Every year thousands of people come to _visit___ it from all over the world.