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Australia
China
China
Canada
Australia
Britain
one country
countries
America
The West Lake is in .
Hangzhou
is in .
Tower Bridge
Britain
They are in .
CN Tower is one of the towers
in the world . ( biggest, tallest )
Canada
tallest
is in .
Big Ben
Britain
Disneyland is in America .
Sydney Opera House is in Australia .
They are in .
Beijing
The Great Wall is the wall
in the world . ( longest , shortest ）
longest
Listen and choose .