Seperate clause from sentence and write name of that clause.
1. That shows how cynical you have become.
2. That they are doing a great job is evident.
3. He asked whether l had bought the ticket.

Dear Student
1. That shows (main clause) how cynical you have become (subordinate noun clause).
2.That they are doing a great job (subordinate noun clause) / is evident (main clause).
3.He asked (main clause) / whether I had bought the ticket (subordinate noun clause).

Regards