单项选择题

Mary ______ that the purchase had been a mistake. However, she didn't.

A．ought to acknowledged
B．ought to have acknowledged
C．should acknowledge
D．should be acknowledging
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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
Though her parents her musical ability, Linda's piano playing is really terrible.
A．pour scorn on
B．heap praise upon
C．give vent to
D．east light upon
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