单项选择题

The U.S. is known as a great "melting pot" because ______.

A．the weather in most part of land is hot
B．the land has several famous volcanoes
C．its people are of different nationalities from all over the world
D．its people are very friendly
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单项选择题
Close by Westminster Abbey on the riverside stands the Palace of Westminster, generally known as the ______.
A．House of Parliament
B．National Gallery
C．British Museum
D．Castle
单项选择题
The official residence of the ______ is at number 10 Downing Street, London.
A．British Prime Minister
B．British Prince
C．British Queen
D．British Duke
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