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
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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
单项选择题
Be careful with John; I think he has ______ motives for being so generous.
A．ultimate
B．ulterior
C．interior
D．hidden
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