单项选择题

As fuel prices rose, bus companies raised their fares and ______.

A．so did the airlines
B．nor did the airlines
C．so the airlines did
D．nor the airlines did
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单项选择题
The business of doctors is to prevent and ______. disease.
A．kill
B．cure
C．wound
D．injure
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You can't afford to let the situation get worse. You must take ______ to put it right.
A．decisions
B．directions
C．sides
D．steps
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