单项选择题

Physics is the present-day equivalent of ______ used to be called natural philosophy, from which most of present-day science arose.

A．that
B．ail
C．which
D．what
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单项选择题
The court considers a financial ______ to be an appropriate way of punishing him.
A．option
B．duty
C．obligation
D．penalty
单项选择题
The board deemed it urgent that these files ______ fight away.
A．had to be printed
B．should have been printed
C．must be printed
D．should be printed
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