摘要：There are robots all around us. Some do very 1 jobs like flying airplanes and driving subway trains. And some do simple jobs. When an automatic washing machine 2 , water goes in. The machine waits until the water is hot 3 washing the clothes. It does this by "feedback". Information about what's happening is "fed back" into the robot to tell it 4 next. Our eyes, ears and other senses are our feedback. They tell us 5 around us. So robots are like people in 6 ways. They work and they have feedback. But 7 robots look like people. Many are hidden away. Robots control the temperature of our houses, our cookers, our hot water systems. We can set the controls to the temperature we want. The robot does 8 . Its feedback usually come from a thermostat. One kind of thermostat is a strip of metal, which bends when it gets hot. At the right temperature, it bends just enough 9 a switch. This turns off the heat. As the air around it gets 10 , the metal gets straight, and this turns the heat on again. 1. A. easy B. simple C. different D. difficult 2. A. is switched on B. is switched C. is switching D. switches on 3. A. after B. before C. as soon as D. while 4. A. how to do B. what to do C. what to do it D. to do what 5. A. what will happen B. what's happening C. to happen what D. something will happen 6. A. some B. any C. two D. three 7. A. many B. a lot of C. very few D. a little 8. A. something B. something other things C. half the work D. the rest 9. A. to work B. working C. to working D. works 10. A. cold B. hot C. cool D. warm

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