13．
The first robots were invented in the 1920s．Robots have appeared in many American films．In some films，they are stronger，faster and cleverer than people．
In real life，robots are mainly used in factories．They do some dangerous and difficult jobs for humans．
Robots also help disabled people，for example，blind people．Today many blind people have a guide dog to help them．In the future，guide dogs might be robot dogs．
One kind of robot guide dog has wheels．It moves in front of the owner．It is very clever．It knows the speed of its owner's walk．The owner wears a special belt （带子）．This belt sends instructions to the owner from the dog，such as"Stop here"，"Turn left"or"Turn right"．
In the United States，another kind of robot helps disabled people to take care of themselves in their daily life．The robot hears the sound of its owner's voice．It follows instructions such as"Turn the page"or"Make a cup of coffee"．
Robots are also used in American hospitals．They can do simple jobs．At one hospital，for example，a robot takes meals from the kitchen to patients'rooms．It never gets lost because this robot has a map of the hospital in its computer memory．
Though robots can help people in many different ways，they will never take the place of humans．
81．From the passage，we know robots cannot beA．
A．dangerous animals
B．factory workers
C．guide dogs
D．hospital helpers
82．A robot guide dogA．
A．goes in front of the blind people
B．walk side by side with blind people
C．has a map in its head
D．helps patients with their meals
83．The underlined word"disabled"meansD．
A．不能的
B．有害的
C．失灵的
D．残疾的
84．Some disabled people need robots help toA．
A．take care of themselves
B．talk to other people
C．become scientists
D．do dangerous jobs
85．In the passage，the writer wants to tell us thatD．
A．robots are stronger and cleverer than humans
B．disabled people cannot look after themselves without the robots
C．robots will take the place of humans some day in the future
D．robots can help humans in many different ways．
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