I later asked her if a certain subject had come up during that dinner.

In some cases however students may apply for certain subjects at a university.

If he was your friend today, you would avoid certain subjects in his presence.

But it soon became clear that certain subjects were off limits.

This is usually to help them with a certain subject, but can also be for enrichment.

Certain subjects use projects and field work as an essential part of their teaching.

They both recognized the need for silence on certain subjects.

"I say that your mind was dwelling on a certain subject."

Mother had held back, or protected them, as she would've said, on certain subjects.

Joe was an old friend, but on certain subjects you had to ignore him.