单项选择题

The fire was finally brought under control, but not ______ extensive damage had been caused.

A．before
B．since
C．agar
D．as
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单项选择题
One of the examination questions ______ me completely and I could n’’ t answer it.
A．baffled
B．mingled
C．provoked
D．diverted
单项选择题
Although he has become rich, he is still very_______of his money.
A．economic
B．thrifty
C．frugal
D．careful
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