单项选择题

The number of the employees ______ in this company.

A．have doubled
B．has doubled
C．are doubled
D．were doubled
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单项选择题
He was a person who would stand up for what he thought right, ______.
A．whatever the cost to himself
B．what the cost to himself might be
C．no matter whatever the cost is to himself
D．however the cost to himself is
单项选择题
These excursions will give you an even deeper ______ into our language and culture.
A．inquiry
B．investigation
C．input
D．insight
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