语法填空（本题有10小题，每小题1分；共计10分)
阅读下面短文, 用括号内所给单词的适当形式填空, 或者在所缺空格内填入适当的词使短文意思通顺、完整。
The first robots were invented in the1920s. Since then robots【小题1】   (appear) in many American films. In some films, they are stronger, faster and cleverer【小题2】   people.
In real life, robots are【小题3】   (main) used in factories. They do some dangerous and difficult jobs for humans.
Robots also help disabled(残疾的) people, for example, blind people. Today many blind people have a guide dog【小题4】   (help) them. In the future, guide dogs might be robot dog.
One kind of robot guide dog has【小题5】   (wheel). It moves in front of the owner. It is very clever. It knows the speed of its owner’s walk. The owner【小题6】   (wear) a special belt(带子). This belt sends instructions【小题7】   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【小题8】   (them) 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【小题9】  , for example, a robot takes meals from the kitchen to patient’s rooms. It never gets lost because this robot has a map of the hospital in its computer memory.
  robots can help people in many ways, they will never take the place of humans.