单项选择题

It was a long time ______ the neighbors found that the old lady had been dead of cold.

A．when
B．until
C．since
D．before
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单项选择题
Physics is the present day equivalent of ______ used to be called natural philosophy, from ______ most of present day science arose.
A．which, what
B．that, which
C．what, which
D．what, that
单项选择题
Our university has introduced sound personnel evaluating system with less emphasis on age ______.
A．than more on ability
B．and more on ability
C．and more ability
D．than ability
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