单项选择题

They said I shouldn’t have done that to help him. But I don’t regret _____ what I thought was right.

A．to do
B．to have done
C．having done
D．being done
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单项选择题
Whenever a pupil makes a mistake, teachers should show him how to correct it ____ punish him.
A．other than
B．rather than
C．sooner than
D．or rather
单项选择题
_____ yesterday _____ I learned that the famous scholar would give a lecture on IT industry.
A．It was not until; when
B．It was until; that
C．It was not until; that
D．It was until; then
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