Make up questions 1.this is an important holiday for us 2.her uncle fed his pet at 7 oclock yesterday

1.this is an important holiday for us.
Is this an important holiday for us?
Why is this an important holiday for us?
This is an important holiday for us, isn't it?
Is this an important holiday for us or for them? 
2.her uncle fed his pet at 7 oclock yesterday
Did her uncle feed his pet at 7 oclock yesterday?
When did her uncle feed his pet?
Her uncle fed his pet at 7 oclock yesterday, didn't he?
Did her uncle or her father feed his pet at 7 oclock yesterday?