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Robot s 1 are not just trying to make robots look like people．For example, there are already robots w 2 in factories．These robots look more like huge arms．They do simple jobs over and over again．People would not like to do such jobs and would get bored．But robots will never get bored．In the future, there will be more robots e 3 , and humans will have l 4 work to do．New robots will have many different shapes．Some will look like humans, and others might look like snakes．After an earthquake, a snake robot could help look for people under b 5 ．That may not seem possible now, but computers, space rockets and even electric toothbrushes seemed i 6 a hundred years ago．We never know what will happene in the future．
1．s________
2．w________
3．e________
4．l________
5．b________
6．i________
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Robot s 70 are not just trying to make robots look like people. For example, there are already robots w 71 in factories. These robots look more like huge arms. They do simple jobs over and over again. People would not like to do such jobs and would get bored. But robots will never get bored. In the future, there will be more robots e 72 , and humans will have l73 work to do. New robots will have many different shapes. Some will look like humans, and others might look like snakes. After an earthquake, a snake robot could help look for people under b 74 . That may not seem possible now, but computers, space rockets and even electric toothbrushes seemed i 75 a hundred years ago. We never know what will happen in the future.
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robots w__2__ in factories.These robots look more like huge arms.They do simple jobs over and over
again.People would not like to do such jobs and would get bored. But robots will never get bored. In
the future, there will be more robots e__3__, and humans will have l__4__ work to do. New robots
will have many different shapes. Some will look like humans, and others might look like snakes. After
an earthquake, a snake robot could help look for people under b__5__. That may not seem possible
now, but computers, space rockets and even electric toothbrushes seemed i__6__ a hundred years
ago.We never know what will happene in the future.
Robot s 70 are not just trying to make robots look like people. For example, there are already robots w 71 in factories. These robots look more like huge arms. They do simple jobs over and over again. People would not like to do such jobs and would get bored. But robots will never get bored. In the future, there will be more robots e 72 , and humans will have l73 work to do. New robots will have many different shapes. Some will look like humans, and others might look like snakes. After an earthquake, a snake robot could help look for people under b 74 . That may not seem possible now, but computers, space rockets and even electric toothbrushes seemed i 75 a hundred years ago. We never know what will happen in the future.
Maybe you know a lot about the city you live in. You may even know some interesting facts about Earth, but 16 do you know about Mars? Will there be 17 there just like people on Earth?
Mars is the fourth planet from the sun and it's the most like Earth, but it's much 18 than Earth because it's farther from the sun. It's also the only planet whose surface can be 19 from Earth.
Mars is often called "the red planet" because the rocks on it have a dark 20 color. There are strong winds on Mars that can 21 dust into the hills.
For many years, people have 22 Mars. They have sent instruments and robots there. Some of the robots got there, 23 most failed.
NASA(美国国家宇航局) sent two robots to Mars two years ago. They wanted to 24 signs of water and life on Mars. Some day, humans will travel to Mars and have an
even 25 look at our red neighbor. Maybe it could be you!
( )16. A. when 
B. what C. which D. how
( )17. A. sound B. life C. air D. water
( )18. A. hotter B. colder C. bigger D. smaller
( )19. A. seen B. wrote C. heard D. visited
( )20. A. red B. black C. white D. yellow
( )21. A. blow B. look C. mix D. fly
( )22. A. lived on B. landed on C. studied D. written
( )23. A. but B. and C. however D. or
( )24. A. leave B. use C. find D. give
( )25. A. faster B. farther C. closer D. lower
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