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

Schooling in Australia between the ages of 6 and 15 is ______.

A．free
B．expensive
C．compulsory
D．optional

单项选择题

The Great Gatsby was written by ______.

A．Wallace Stevens
B．Thomas Steams Eliot
C．Ernest Hemingway
D．F. Scott Fitzgerald