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Should I would promote prayer as a part of the pupils' everydayuse life/lives or lives in the following question?

I would promote prayer as a part of the pupils' everyday life

I would promote prayer as a part of the pupils' everyday lives

I would promote prayer as a part of the pupils' everyday life/lives

Should I use life or lives in the following question?

I would promote prayer as a part of the pupils' everyday life

I would promote prayer as a part of the pupils' everyday lives

1
source | link

Should I use life or lives in the following question

I would promote prayer as a part of the pupils' everyday life/lives