单项选择题

Some people think that robots can______.

A．help improve working conditions
B．baby-sit machines
C．make jobs more interesting
D．cause factories to lose business
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单项选择题
The passage is mainly about______.
A．robots
B．jobs
C．workers
D．factories
单项选择题
Factory owners use ______ all across the country.
A．no robots
B．hundreds of robots
C．many thousands of robots
D．few robots
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