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 is the biggest church in London
A．More Church
B．Christian Church
C．St. Paul's Cathedral
D．St. Henry Cathedral
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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