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The Great Wall of China is the l_____ wall in the world. It goes from w____ to east, over m______, through valleys(山谷) and finally reaches the sea.
The Great Wall is more than 8,000 kilometers l    , six to seven meters high and four to five meters wide. In most places it is wide e_____ for five horses or ten men to walk side by side a______ the top.
I t was very d______ to build such a great wall in the old times. T______ of men died when they built it. The Great Wall was made not only of stones, but millions of lives.
Today, the Great Wall becomes the place of i______ not only to theC     people, but also to people all over the world.