1.  I had serious questions involving it.

2.  I have a question which might sound a bit silly.

3.  If you have any questions regarding any of our services, please feel free to call me.

4.  If you have any questions, can you ask them at the end, please.

5.  If you have any questions, feel free to ask me anything at all.

6.  If you have any questions, please raise your hand.

7.  In addition, peo-ple have new questions, arising as often from media reports of scientific studies as from popular myth.

8.  Tell her you have already done some research on it but have some questions about a particular area.

9.  Before we move on, does anyone have any questions?