单项选择题

The best title for this passage is ______.

A．Humans
B．Robots
C．Computer
D．Metal Hand
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单项选择题
What can robots do in unpleasant surroundings
A．They can take the lunch breaks.
B．They can have the vocation.
C．They can work 24 hours a day.
D．They can go on strike.
单项选择题
This plant grows ______ of Africa.
A．to the south
B．in the south
C．on the south
D．into the south
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