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A. the UK       B. China       C. Australia       D. the US E. the Great Barrier Reef       F. the Great Wall       G. Stonehenge H. Big Ben       I. Yellowstone National Park       J. Sydney Opera House

1．It's the longest wall in the world. Lots of people visit it every year. It's _______. You'll see it in _______.
2．It's the biggest coral reef（珊瑚礁）in the world. It's _______. You will see it in _______.
3．It's in Sydney and it is one of the most popular places in this city. The city is famous for it and the 2000 Summer Olympic Games. It's _______. You'll see it in _______.
4．It is an old and tall clock tower. It's _______. You'll see it in _______.
5．It's the first national park in the world. It's _______. You will see it in _______.
6．There are lots of tall stones. It has a very long history. It's _______. You' ll see it in _______.