单项选择题

The passage is mainly about______.

A．robots
B．jobs
C．workers
D．factories
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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
单项选择题
What is special about bungee jumping
A．It is more difficult and dangerous for people to do.
B．It takes much shorter time to get pleasure.
C．The people, who take part in it, need special training.
D．It is hard to find a proper place for it.
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