单项选择题

Which of the following about language is NOT correct

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

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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 solidarity-with-housewives strand of feminist thought (the first sentence in the fourth paragraph) refers to ______.

A．the first strand of feminist thought
B．the second strand of feminist thought
C．the third strand of feminist thought
D．none of the above