英语阅读理解Can dolphins talk?Of crouse they can't talk with words

英语阅读理解
Can dolphins talk?Of crouse they can't talk with words,but theycan talk with sounds.They show their feelings with sounds.They always travel in a group．We call a group of fish a “school”．They do not study,but they travel together．Dolphins are not fish,but they swim together like fish in a school．Dolphins talk to others in the school．They give information to each other．They talk when they piay,and also when they're happy or sad or ．
They make sounds adove water and make more sounds under water.They say “welcome” when a dolphin comes back to the school．They talk when they play,and also when they're happy or sad．
They make sounds above water and make more sounds under water.People can't hear these sounds because they are very high.Scientists make tapes of the sounds and study them．
Sometimes people catch dolphins for an aquarium,so we can watch them in a show．But they do not like to be away from their school in an aquarium.They are sad there.There are many stories about dolphins．A lot of people believe they can help people．A few years ago,a group of dolphins saved a swimmer's life．Dolphin's meat is good,but people don't like to kill them.They say dolphins bring good luck and they're our friends.
( )The word "school"in these passage means_________.
A.a place for students to study B.a special kind of animas
C.a group of fish traveling toghter D.a place for teaching dolphins
( )A dolphin makes a sound to__________.
A.show other dolphins they are happy
B.tell other dolphins they are sad
C.let people know they are playing
D.give information to the other dolphins
（ ）People can't hear dolphins' sounds under water because__________.
A.they are very high B.they are very slow
C.they don't want us to find them D.they want to bring good luck
( )Dolphins would like to__________.
A.study at schools B.be away from their school
C.stay with the other dolphins D.be in shows
( )What's the best title for this passage?
A.The Dolphin.B.Schools of Dolphins
C.Dolphin's Talk.D.People's Friend.