单项选择题

In some speech community, two languages are used side by side with each having a different role to play, this is ______.

A．pidgin
B．creole
C．diglossia
D．bilingualism
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单项选择题
Which movie is not awarded the Oscar's best movie
A．American Beauty
B．A Beautiful Mind
C．Shakespeare in Love
D．Secret Window
单项选择题
We may hear children say what he wants . This is an example of ______.
A．interference
B．transformation
C．overgeneralization
D．over-extension
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