Is he the only person who knows the secret?

1. Is he the only person who knows the secret?

Does ……………………………………………………………………………

2. These are problems which can only be solved politically.

These are problems to which ………………………………………………………

3. People say that animals are mistreated in that circus, but I didn’t see this.

I didn’t see…………………………………………………………………………..