单项选择题

Which of the following about language is NOT correct

A．Language is arbitrary.
B．Language is a system which consist of two levels: sounds and meaning.
C．Language is vocal.
D．Language is a fixed system and is not productive.

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单项选择题

The following are the founding fathers of the American Republic except ______.

A．George Washington
B．Thomas Jefferson
C．Willian Penn
D．Benjamin Franklin

单项选择题

North America borders both the North ______ and the North ______.

A．Arctic Ocean, Indian Ocean
B．Atlantic Ocean, Pacific Ocean
C．Atlantic Ocean, Arctic Ocean
D．Indian Ocean, Pacific Ocean