根据课文内容填空，除填入括号中单词的正确形式外，其余每空填一个词。

     Festivals of all kinds   1    (hold) everywhere since ancient times. Most festivals would    2   the end

of cold weather, planting in spring and   3   in autumn. But some festivals are held to honor the   4   or to

satisfy the ancestors,   5   might return either to help or to do harm. For the Japanese festival Obon,

people should go to clean graves and light incense in   6   of their ancestors.   7   this important day, they

also light lamps in front of houses and play music   8   they think this will lead the ancestors back to home.

It is a time for the family to get   9   , share feelings with each other and be   10    of their customs.  

氨冷冻系统包括冰机，D-11、D-32、E-22。