Who haven’t solved the problem yet?
Who have done a lot of work today?
Who have already washed the floor?
What haven’t ripened yet?
Who have never been to London?
Who hasn't read this book yet?
Who have already published her new novel?
1) Who
2)What
3) When
4) where
5) how many
6) why
Green frog, green frog. where do you live? I live on a farm, I live in a house, I live in zooparke. And where do you live?