单项选择题

By the year 2000, production in the area is to double ______ of 1990.

A．that
B．it
C．one
D．what
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单项选择题
John was young, ______, he was equal to this important task.
A．therefore
B．moreover
C．nevertheless
D．hence
单项选择题
The prisoner has been _______ of many privileges that average citizens enjoy.
A．ensured
B．informed
C．deprived
D．convinced
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