单项选择题

Sometimes, two varieties of a language exist side by side throughout the community, with each having a definite role to play. This phenomenon is ______ .

A．bilingualism
B．diglossia
C．pidgin
D．creole
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单项选择题
Who were the ancestors of the English and the founders of England
A．the Anglo-Saxon
B．the Normans
C．the Vikings
D．the Romans
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______ is the largest state in terms of size and population in America.
A．California
B．Indiana
C．Kansas
D．Massachusetts
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