请根据下面短文回答第61-65题
Mr. Jenkins works in a middle school. There he teaches his students English. He works hard and is very busy. After supper, when his families watch TV, he always reads some newspapers in his room. At times Robert comes in and asks him to tell him a story. He likes his little son and does all what the boy wants.
One Sunday Mrs. Jenkins was doing some housework and Mr. Jenkins was reading a newspaper. Robert came in but he didn’t say anything. About ten minutes later the boy showed a newspaper to him and called out, “There will be a baseball (棒球) match tonight,Dad!”
Mr. Jenkins was surprised. He said to himself,“The boy is only three years old. How can he read the newspaper”
He held up the newspaper and began to look for the news. But he couldn’t find it. At last the boy showed him an exclamation mark on the newspaper.
“An exclamation mark”in the story means______.