— Christmas is coming. Do you want to go out ________ do some shopping?

— No, I'm busy. ________ I really want to.

A.and; Or B.and; But C.but; And

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My mother is our math teacher. We all like________very much.

A.he B.she C.his D.her

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Programming Pain

Robots are useful and taking place of humans in some areas because they never get tired and can't feel pain. However, some researchers believe it's a good idea to program robots to feel pain.

Researchers from Leibniz University of Hannover in Germany are working to develop an artificial（人造的）robot nervous system to teach robots how to feel pain. "Pain is a system that protects us," said Johannes Kuehn, one of the researchers. "When we try to avoid the pain, it helps us not get hurt.”

Think about how many injuries you would receive if you couldn't feel pain. Even though pain hurts, it helps us avoid danger and treat our wounds. The same will be true for robots. As a great number of people work closely with robots, the robots must behave in a safer manner. Kuehn believes that by protecting robots from damage（傷害），they'll be protecting people as well. Damage,to robots if left unseen could lead to workplace accidents.

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Antonio Damasio, a professor at the University of Southern California, argues that programming robots with a sense of pain may cause an artificial sense of feeling to develop. But he says that this communication is not the same thing as a robot truly feeling and expressing emotions or pain. If one day, robots could actually feel as humans do, Damasio has a suggestion for the number one rule for robots: Feel good.

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C.An artificial system. D.A new kind of robot.

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When you are talking about someone, but at that time you can't remember his or her name. What should you do then? Don't worry! In English, you can use other names to replace (代替) their real (真實的) names.

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