单项选择题

Mr. Young and Miss Liu from America.

A． both are
B． are both
C． are all
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单项选择题
The text is very easy for you. There are ______ new words in it.
A． a few
B． a little
C． few
单项选择题
This factory has been ______ for two weeks.
A． open
B． opening
C． opened
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