Many companies use guards and expensive alarm systems to protect their property (财产). Soon a new kind of protection will be used—robots. Engineers have been working on the first mobile robots for businesses. The robots will guard factories, warehouses (仓库) and museums at night.

    The mobile robots will move around slowly on wheels. They will be able to detect (察觉,发现) people through walls and pick up sounds, such as breaking glass. They can be fixed with loud sirens to frighten thieves, or radios to signal police or guards.

    To protect a building, a robot will have to move around without knocking into the walls. Information about the building will have to be stored in the robot’s small, built-in computer. A floor map could be programmed into the computer’s memory, for example.

    A mobile robot will not be able to do everything. Unlike human guards, it will not be able to climb stairs, open doors, or move along rough ground. It won’t be able to tell the difference between friends and enemies. Because of that, people will have to be prevented from entering the area it moves.

    One kind of mobile robot will be able to “sense” whether a chair or a box has been moved and go around it. This robot will also judge size well enough so that it won’t send an alarm if a cat crosses the room. And if someone tries to steal this robot, it will sound a loud, painful siren. The three-foot-tall robot is hard to be stolen anyway. It weighs about 200 pounds.

U.S. companies pay almost $10 billion a year to protect their property with alarm systems and human guards. Mobile robots may be cheaper.  (296)

1. Why is the new kind of robots called mobile robots? Because they can _____.

A. guard factories, warehouses and museums

B. send loud, painful sirens when it is stolen

C. sense moving objects and signal police

D. move around and do the programmed work

2. How will a robot get directions for moving around a building?

A. From a human guard.                                B. From a built-in computer.

C. From another robot.                                  D. From radio signals.

3. What can be the best title of this passage?

A. New Guards.                                               B. Science and Technology.

C. Alarm Systems.                                           D. Engineers and Robots.

根据句意和提示写出单词，完成句子。
【小题1】Women in China are usually dressed in     (红色的) on their wedding day.
【小题2】How    (容易) you will find it to use the mobile phone if you know the function!
【小题3】The    (时装) show held by UNICEF last week was a big success.
【小题4】Seeing these old ladies get on the bus,   (几个) students offered them their seats.
【小题5】We need your help to  (筹集) money for those homeless children.
【小题6】The traffic lights are    (控制) by a central computer.
【小题7】The ORBIS volunteers were      (自豪的) to help so many blind people in need.
【小题8】The naughty boy ran into the garden and    (吓唬) the little cat away.
【小题9】“Help     (you) to some fish.” Lucy said to Aunt Amy politely.
【小题10】John is so   (honest) that no one believes him.
【小题11】Many people do not know the  (important) of the wetlands.
【小题12】There were thirty people in the classroom,   (include) the teacher.
【小题13】The  (develop) of science has changed our world a lot.
【小题14】Chinese national teams are   (active) preparing for London Olympic Games.
【小题15】The boy is more than 2 metres in      (high) and he is good at playing basketball.

My sister ______ text messages to me on the mobile phone,but now she ___ e-mails on QQ.

A. is used to send ; used to send     B. is used to sending ; used to send

C. used to send ; is used to sending  D. used to send ; used to send