Fish are beautiful. Raising fish is a art. Fish should be kept in a glass container where contains water and

           1. is                                 2. an                                                           3. which

a layer of sands. Water plants should be put in them. When winter come, the container should be put where 

                                                                   4. it                    5. comes

∧is warm. The water should be kept in the temperature of 20℃.The fish should be fed on regularly every day,

6. it                                              7. at                                                               8. 去掉on

and∧the water should be changed once a week. By doing so people become patient or develop a good habit of

    9. in

keeping regularly hours. 

          10. regular