单项选择题

A．It will make workers less productive.
B．It’s hard to be given in the modern factory.
C．It will increase criminal rates.
D．It’s very difficult to control the workers.
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单项选择题
A．They hired someone to stay in their home. B．They left their pets with their relatives. C．They rented their house to a student. D．They asked their secretary to watch their home.
A．They hired someone to stay in their home.
B．They left their pets with their relatives.
C．They rented their house to a student.
D．They asked their secretary to watch their home.
填空题
C
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