Ответ:

2. Have you any idea why there are no buses today?

3. Can you tell me who won the star prize?

4. Do you know if the window cleaner came today?

5. Could you tell me how much this vase costs.

6. Have you any idea how they know the results already?

7. Could you tell me what the time is?

8. Can you tell me whether the shops are open tomorrow?