单项选择题

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单项选择题
Free Parks are cutting back on staff because ______.
A．they are not charging for tickets
B．only a few staff members are needed for park operations
C．the park operators are short of cash and they have to operate in an economical way
D．Both A and B.
单项选择题
A．produceB．performC．doD．undertake
A．produce
B．perform
C．do
D．undertake
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