单项选择题

She is making herself iii with ______ over her son's future.

A．troubles
B．annoyance
C．worry
D．consideration
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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
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
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