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And thanks to the continual miniaturization of electronics and micro-mechanics, there are already robot systems that can perform some kinds of brain and bone surgery with submillimeter accuracy — far greater precision than highly skilled physicians can achieve with their hands alone.
　　
　　But if robots are to reach the next stage of laborsaving utility, they will have to operate with less human supervision and be able to make at least a few decisions for themselves — als that pose a real challenge. "While we know how to tell a robot to handle a specific error," says Dave Lavery, manager of a robotics program at NASA, "we can't yet give a robot enough 'common sense' to reliably interact with a dynamic world."
　　
　　48. According to the text, what is beyond man's ability now is to design a robot that can ________.
　　
　　[A] fulfill delicate tasks like performing brain surgery
　　
　　[B] interact with human beings verbally
　　
　　[C] have a little common sense
　　
　　[D] respond independently to a changing world

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