短文填空（共10小题，每小题1分，计10分）
从方框中选择适当的单词，并用其适当形式完成短文，每词只能用一次，每空一词.

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The       pyramids were built around 2560B.C.The largest one of them is the Great Pyramid of Khufu. It’s one of the Seven Wonders of the World .The King ,Khufu ,built the Great Pyramid as his tomb.        show that it        1000000 people over 20 years to complete it .
The Great Pyramid was      a unique building in the 19^th century A.D. At that time ,it was still the        building in the world .According to        research ,the ancient King ,Khufu ,ordered his men to build the Great Pyramid stone by stone .The biggest stone        as much as 15 tons .Each stone was fixed so well, though the ancient workers didn’t have any modern tools .The Great Pyramid has four sides and each sides is 230.4 meters and 146.5meters high. At that time ,there were no modern        or equipment ,so how did the ancient people build the Great Pyramid? To this day ,it still a mystery .But many scientists continue to study their       .The completion of the Great Pyramid      the achievements of ancient working people .