Directions : Complete the following passage by filling in each blank with one word that best fits the context . Stonehenge(巨石阵) is one of the greatest and most mysterious monuments in the world. It was built several thousand years ago on the Salisbury Plain(平原),   1.________   the southwest of England. 2.________   are circles of stones in the main monument. The outer one has been seriously damaged over time.      It doesn't seem very different  3.________   other circles in the world,   4.________  it gets much more attention. Maybe this is because of the way it was built and its functions. Stones used in the building can be found in places far away and some are said to have come from 5.________   place 385 kilometers away. How builders took these stones,  6.________   are four tons each, to the site remains a mystery. After that, builders had to put all the stones up in the correct position. This would have taken amazingly advanced techniques so long ago. No one knows exactly  7.________   Stonehenge was built, but many people have their own suggestions. It's widely accepted   8.________   Stonehenge was a meeting place for religious ceremonies. However, people have no evidence to show that it's true.