单项选择题

The university has launched a research center to develop new ways of ______ bacteria which have become resistant to drug treatments.

A．regulating
B．halting
C．interrupting
D．combating
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单项选择题
The car costs ______ the other one.
A．as much over
B．as much to
C．as much more as
D．as much as
单项选择题
He was amazed at ______ he saw.
A．that
B．what
C．which
D．whom
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