Aunt Martha was upset with Nathan, for he had done poorly on his examinations. Looking at his grades, she spoke in an angry tone, “You have really disappointed me! You are " Tring-tring rang the telephone. ”

Question

How should Aunt Martha’s response be punctuated to show that she was interrupted by the sound of the telephone?

Answer 1

Aunt Martha’s response can be punctuated like this:

“You have really disappointed me! You are—” Tring-tring rang the telephone.

The dash signifies that her sentence was cut off by the interruption.