单项选择题

If the whole operation ______ beforehand, a great deal of time and money would have been lost.

A．was not planned
B．has not been planned
C．had not been planned
D．were not planned
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单项选择题
I m very sorry to have ______ you with so many questions on such an occasion.
A．interfered
B．offended
C．impressed
D．bothered
单项选择题
We love peace, yet we are not the kind of people to yield ______ any military threat.
A．up
B．to
C．in
D．at
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