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Probably you have seen photos of the Grand Canyon. But you must go there    1    to feel its size and beauty. The Grand Canyon is one of the greatest
   2    wonders of the world.
The Colorado River made the Grand Canyon over millions of years. Slowly, the river cut down   3   hard rocks. At the same time, the land was    4   . Today the canyon is very   5   . It’s also very    6   , about 20 kilo-
metres. And    7    its height, there are different kinds of plants and animals on both sides of the canyon.
The canyon looks different at different times of the day, and   8    different seasons and weather. At sunrise, the red, gold, brown and orange colours of the rocks are    9    clear and bright. Whether you see the Grand Canyon from the top or the bottom, it will be a(n)   10    that you will never forget.

A．you B．your C．yours D．yourself

A．natural B．modern C．ancient D．national

A．along B．through C．across D．past

A．rise B．rising C．rose D．risen

A．more B．dangerous C．deep D．low

A．long B．deep C．high D．wide

A．as a result B．because of C．thanks to D．thanks for

A．in B．on C．at D．for

A．especially B．friendly C．hardly D．differently

A．interview B．trip C．visit D．experience