15.
Last Sunday, Mr. Ma was taking part in a party with his friend, a doctor in a hospital for the deaf-mutes（聋哑人）.
“How can I invite a deaf-mute girl to dance?” asked Mr. Ma.
“It’s easy. Only nod to her.”
So Mr. Ma nodded to a pretty girl with a smile, and the girl danced with him. There were five songs over, but Mr. Ma still danced without speaking. Then, another young man walked to them.
“Dear, when can I dance with you? It was enough an hour that we can’t dance together.” He said to the girl.
“Yes, but dear. I still thought how to say goodbye to the deaf and dumb fellow(家伙)