Joke 53: Home work

"Johnny, where's your homework?"
Miss Martin said sternly to the little boy while holding out her hand.
"My dog ate it," was his solemn response.
"Johnny, I've been a teacher for eighteen years. Do you really expect me
to believe that?"
"It's true, Miss Martin, I swear," insisted Johnny.
"I had to force him, but he ate it!"