She added an interrogation mark at the end of the sentence to indicate uncertainty.

Teachers explained why interrogation marks are not commonly used in informal texts, and showed alternatives.

When I typed the note, I accidentally left a stray quote mark at the end.

When learning Mandarin, paying attention to tone marks can prevent misunderstandings.

The surveyor traced the faded tomahawk mark on the oak and confirmed the old boundary line.

The model's beauty-marks became a signature feature that photographers loved.

The engineer added a center mark to the circle on the technical drawing to indicate the exact drill location.

The linguist placed a subtle tone mark above the vowel to show its rising pitch.

Even after he was pardoned, some townspeople treated him as if he bore the mark of Cain.

The recipe lists both Celsius temperatures and gas marks for easy reference.