Each has its function and can be used to answer certain questions.

Now that certain questions were answered, I had other ones.

I had been waiting to ask a certain question, and felt it was a good time.

It is of him that public and Congress should ask certain questions.

To reach that goal, they had to answer certain questions.

Time for me to take over, or we'd never get certain questions asked.

There's a certain question we have to ask ourselves sometimes.

All I need from you is the answer to certain questions.

However, there were certain questions that we had to raise.

Are there not certain questions we should ask ourselves here?