Где надо подставлять was,were,wasn't,weren't were you at work yesterday? no, i you at home? yes, i your parents at home? no,they , but my grandparents there you ill? no, i , but my dog . she's ok now

1. No, I wasn't
2.
- Were you at home?
- Yes, I was
3. 
- Were your parents at home?
- No, they weren't, but my grandparents were there
4.
- Were you ill?
- No, I wasn't, but my dog was. 

P.S.
I, He, She, It — was
We, You, They — were