阅读下列短文, 从所给的四个选项中, 选出最佳答案。

    Fish hear sounds, though they have simply no ears outside their　　 bodies. However, fish do have ears inside their bodies near the brain,　　 and they hear very well with them. Some fish have been taught to　　 recognize the difference between sounds better than some human beings　　 do.

    Many underwater animals make noises only by chance while they are　　 doing something else. Other sounds are real communications of a simple　　 sort, telling one fish of the presence and direction of another. A few　　 noises may be warning messages or discovery of food, etc. The earliest　　 scientific report on fish sounds referred to one of these.

    A new field in science is learning to recognize and use underwater　　 sounds. It relies on the same skill that man has shown in recognizing　　 birds and other land creatures by their calls. But this method is a　　 greater challenge than bird watching, for many of the animals of the　　 sea cannot be followed in any other known way. Their voices cry for　　 attention. Yet we still have too little knowledge about many of the　　 call makers. Perhaps the meaning of the calls and what the call makers　　 are will some day be made known more carefully. It is as though the　　 great oceans were for daring man to invade (涌人) them and to learn　　 the secrets of the place from which his forefathers came so long ago.　　

(1)  After reading the passage, we can conclude that_____.［　　］ 

 A. many fish often make meaningless noises　　 　　

 B. sound cannot pass through some fish bodies　　    

 C. sound waves can easily be felt by fish bodies　　    

 D. some fish can easily understand some land creatures' call 

(2)  Which of the following is true of the noises made by underwater　　 animals?　　　　　　　　　　　　　　　　　　　　　　　　［　　］　　 　　

 A. Some are meaningless.

　　 
 B. None of them is meaningless.　　 　　

 C. They are all actual communications.　　 　　

 D. They cannot be heard by human beings. 

(3) Recognizing underwater animals____________.    ［　　］　　   

  A. is totally different from recognizing land creatures by their calls    

  B. is more difficult than recognizing land creatures by their calls　　   

  C. will change people's knowledge of fish　　 　　

  D. is more or less a battle 

(4)  One of the earliest scientific reports on fish sounds was about 　　 　　___________.　　 　　　　　　　　　　　　　　　　   ［　　］　　    

   A. noises made occasionally by underwater animals 

   B. some sort of communication between fish　　   

   C. the difference between sounds 

   D. what sort of fish the call makers was

 (5)  From the last sentence, we can learn that __________.   ［　　］　　    

 A. the human beings have invaded the oceans for long 

 B. more secrets of the great oceans are to be found out 

 C. only very brave people can make use of the great ocean　　   

 D. people are fighting each other to become the master of the great　　 　　   oceans