单项选择题

The most important economic activity in Canada is ______.

A. mining
B. fishing
C. farming
D. manufacturing
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单项选择题
The type of language which is selected as appropriate to a particular type of situation is called
A. variety.
B. dialect.
C. slang.
D. register.
单项选择题
Noah Webster was a _________ .
A. novelist
B. poet
C. lexicographer
D. essayist
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