Their mother . the party yesterday.
1.did not enjoy
2. is not enjoying
3.were not enjoying​

My mother didn't enjoy the party yesterday.

1.did not enjoy вот правльно

  others

  other

others

  other/the other

  others 

1.) it (was) sunday yesterday and they (were) at home.

возможен и этот вариант:

  it (was) sunday yesterday and they (weren't) at home.  2.) kim (was) at her grandmother's yesterday.

возможно:

  kim (wasn't) at her grandmother's yesterday.  3.) she (is) at home.  4.) mum and dad (were) at work yesterday.  возможен и этот вариант:

  mum and dad (weren't) at work yesterday.  5.) they (are) in the village.