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
Buckingham Palace is ________'s present London home.
A．parliament
B．churchmen
C．monarch
D．the prime minister
单项选择题
Japanese attacked the Pearl Harbor in __________.
A．1940
B．1941
C．1942
D．1943
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