In warm water．there is a kind of sea mammal（哺乳動(dòng)物）called dugongs．They live a comfortable life．They have no natural enemies（敵人）and never fight（打架）．Dugongs lived in the oceans during the age of dinosaurs（恐龍）．They have funny faces and no front teeth! Their teeth grow only along the sides of their mouths．Some think they are ugly．Only their mothers may love them，but as we know, they are important and helpful for us!

    Dugongs only eat plants．They swim slowly so that they can eat the sea grass They often dig down into the sand and eat sea-grass roots．Dugongs relax during the day．During most of the night，they eat．They eat noisily and you can often hear the sounds of their chomping teeth．

    Dugongs give birth to only one baby every three to five years．They take the newborn baby to the surface of the water so that the baby can take its first breath of air．It stays with its mother for two years and sometimes rests on its mother’s back．Dugongs feed their young with milk．

    Dugongs can live for about 60 years，but every year more and more people move to the warm coasts and rivers which are also the homes to dugongs．

1．Which is the best title for this article?

A．The Kind Animal                                         B．Dugongs’Lives

C．Dugongs Are Nice                                      D．Mother Loves Dugongs

2．The underlined words“chomping teeth”mean ________．

A．washing teeth                                             B．changing teeth

C．eating loudly                                              D．opening the mouth

3．Which of the following is TRUE?

A．Dugong babies live with their mother when they are 3 years old．

B．Dugongs eat animals and plants．

C．Dugongs give birth every year．

D．Dugongs can live for as long as 60 years．

4．Why do dugongs have fewer places to live and feed? Because ________．

A．they live a comfortable life                          

B．they only eat plants

C．more and more people move to the warm coasts and rivers which are also the homes to dugongs

D．they give birth to many babies every year．

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