填空题。
Robots are smart. With their computer brains, they help people work in d__1  _ places or do difficult
jobs. Some robots do regular jobs. Bobby, the mail carrier, brings mail to a large o__2  _ building in
Washington D.C. He is one of 250 mail carries in the United States.
Mr Leachim, who weighs two hundred pounds and is six feet t__3 _, has some advantages as a teacher.
One is that he does not f__4  _ details. He knows each child’s name, the p__5  _ names and what each
child knows and needs to know. In addition, he knows each child’s pets and hobbies. Mr Leachim does
not m___6  _ mistakes. Each child goes and tells him or her name, then dials an identification number. His computer brain puts the child’s voice and number t__7  _. He identifies the child with n__8  _ mistakes.
Then he starts the lesson.Another advantage is that Mr Leachim is flexible. If the child needs m__9 _ time
to do their lessons they can move switches. In this way they can repeat Mr Leachim’s lesson over and
over again. When the children do a good job, he tells them something i__10   about their hobbies. At the end of the lesson the children switch Mr Leachim off.

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