单项选择题

A．Because she is lonely.
B．Because she loves to protect a pet.
C．Because she thinks dogs are good companions.
D．Because she just lost one dog.
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In short, a leader of the new school contends, the scientific revolution, as we call it, was largely the improvement and invention and use of a series of instruments that expanded the reach of science in innumerable direction.
单项选择题
A．Recruiting new staff.B．Producing quality products.C．Increasing productivity.D．Save money and labor cost.
A．Recruiting new staff.
B．Producing quality products.
C．Increasing productivity.
D．Save money and labor cost.
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