单项选择题

Why were female cats usually employed by the Post Office

A．They could work for 24 hours a day.
B．They were worse hunters.
C．They were more persistent hunters.
D．They worked the whole night.
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单项选择题
When did Post office in Britain employ cats
A．In 1868
B．In 1886
C．In 1898
D．In 1889.
单项选择题
The author suggests that implementing manufacturing competitiveness is a strategy that is ______.
A．flawed and ruinous
B．shortsighted and difficult to sustain
C．popular and easily accomplished
D．useful but inadequate
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