单项选择题

The last word of the passage "addictive" means ______.

A．excessive
B．enthusiastic
C．dependent
D．progressive
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单项选择题
From the third paragraph, we can know that ______.
A．there has not been a true humanlike robot yet
B．computers in the robots are expensive
C．robots may do what they are told
D．robots have been designed to work independently
单项选择题
Which of the following conclusions is best supported by the second paragraph
A．Robot does not last long.
B．The early men made toys themselves.
C．Man has always had a desire to make a copy of him self.
D．The materials for making a copy of man are limited.
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