单项选择题

If only we _________ then the disease was curable.

A．knew
B．could know
C．had known
D．would have known
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单项选择题
Tom was so obviously sorry for his mistake that we __________ him.
A．forgave
B．pardoned
C．excused
D．punished
单项选择题
These excursions will give you an ever deeper _________ into our language and culture.
A．inquiry
B．investigation
C．input
D．insight
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