单项选择题
Why were female cats usually employed by the Post Office
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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.
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填空题
in public
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