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
As Americans are called Uncle Sam, British are called ______.
A. Henry Bull
B. John Bear
C. John Bull
D. John Bear
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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