A question about his behavior remained in my mind.

He was holding my hand tightly.

He was running while holding a bag.

He always carries an umbrella around.

The mayoral election will be held next week.

We elected a new mayor.

These experimental results support our hypothesis.

It's difficult to make sentences using interrogatives.

He is learning how to make interrogative sentences.

Can you give me an example of a rhetorical question?