. Change the questions to the Passive Voice according to the

 1. Are any changes being done by people in your city now? We use Present Continuous Passive because the action is in process at the moment of speaking (now). 

2. Are different languages spoken in different regions of your country? We use Present Simple Passive to denote an action which takes place regularly. 

3. When are gifts usually received in your country? We use Present Simple Passive to denote an action which takes place regularly. 

4. Should a "thank-you" letter be written nowadays? We use Present Simple Passive to denote an action which refers to present (nowadays). 

5. What holidays are celebrated in your country? We use Present Simple Passive to denote an action which takes place regularly. 

6. What songs were sung when you were a child? We use Past Simple Passive to denote an action which took place in the past.