Magic is a form of entertainment that is based on pretending to do things that are impossible.The magician is a specially trained actor.He tries to make the audience believe that he has the power to do things which are against the laws of nature.
   Magic shows are entertaining as long as the audience does not discover how the tricks are done.The magician usually depends on his skill with his hands，on his knowledge of psychology，and，sometimes，on mechanical devices（機(jī)械裝置）.Since magic performance is meant to trick people，the use of psychology is important.The magician must keep people from noticing all the movements of his hands and from thinking about the secret parts of his equipment.He must also lead the audience to draw false conclusions.The magician's success depends on the fact that many things seen by the eye are not the things that matter.
   Two basic magic tricks are making objects seem to appear and making objects seem to disappear.A combination of these two tricks makes for some interesting effects.For example，the magician puts a small ball under one of several cups.The ball then seems to jump from one cup to another or to change colour.What actually happens is that the magician，employing quick hand movements or a mechanical device，hides one ball.While doing this he talks to the audience and waves a brightly coloured cloth with one hand.The audience is too busy watching the cloth and listening to the magician's words to notice that his other hand is hiding the ball.
   Another favourite trick is to cut or burn something，and then make it appear whole again.What actually happens is that the magician makes the cut or burned object disappear by quickly hiding it while the audience watches something else.Then he "magically" makes it appear whole again by displaying（展示）another object that has not been cut or burned.

（1）What is the author's main purpose in writing the text？

C

C

A．To promote a magic show.
B．To teach people to be magicians.
C．To explain the art of magic.
D．To praise the talents of magicians.
（2）Which of the following is important for a successful magic trick？

B

B

A．Moving stage equipment.
B．Directing the audience's attention.
C．Applying high technology.
D．Keeping the performance in secret.
（3）What does the author focus on in the last two paragraphs？

A

A

A．Providing examples.
B．Making a summary.
C．Drawing comparisons.
D．Explaining a concept.
（4）What can we infer from the text？

C

C

A．Mechanical devices are expensive.
B．Most magicians employ assistants.
C．It takes practice to perform magic.
D．Small objects are magicians' favourite.