单项选择题

They ______ so tired if they ______ for a whole day.

A．wouldn't feel ... didn't walk
B．wouldn't feel ... weren't walking
C．wouldn't be feeling ... weren't walking
D．wouldn't be feeling ... hadn't been walking
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单项选择题
It's a shame ______ able to give them any advice.
A．not to have been
B．to have not been
C．to have been not
D．to not have been
单项选择题
The vast majority of people in any given culture will ______ to established standards of that culture.
A．confine
B．conform
C．confront
D．confirm
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