Preparing an omelet (煎蛋) may seem easy enough. But suppose one of the eggs has gone bad, even the most “intelligent” robot would probably still use it. If something slightly unusual needs doing something that requires even a little of ordinary human imagination, a robot is useless. They need programming for even the simplest of tasks and are not able to learn from experience. And teaching a robot how to recognize a bad egg is more difficult than teaching it to prepare the omelet, Dr Sandra Lomax says.

　　21. A London company called UAS has already developed a machine which________.

　　A. can teach languages and care for the patients in hospital

　　B. can help old people do certain jobs in the house

　　C. is controlled by microcomputer “brain”

　　D. can accept simple voice instructions

　　22. The director of UAS believes that in the next five to ten years new forms of machines will________.

　　A. be able to “think” with their own brains and do anything with imagination

　　B. cost less than $1,000

　　C. be used more in ordinary homes than in industry

　　D. do more housework

　　23. Dr Sandra Lomax thinks that________.

　　A. no robot will ever be able to prepare an omelet

　　B. a robot will soon be able to do unusual housework people can’t do

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