1) Was
there a problem? (Present Perfect)
Has there been a problem?
2) Are
there any restaurants open? (Future Simple)
Will THERE BE any restaurants open?
3) There
will be a tornado in Kansas.
(Present Perfect, negative)
There hasn�t been a tornado in Kansas.
4) Is there
a text today? (Future Simple)
Will THERE BE a text tomorrow?
5) There
isn�t a road here. (Past Simple, question)
Wasn�t there a road here?
6) Are
there any winners? (Future Simple, negative)
Won�t THERE BE any winners?
The rest seems fine to me. If I �m wrong, please correct me.
So actually, you only have ONE mistake there. :)