阅读下列图片，回答问题：

​

    My name is Cathy. I'm a fourteen-year-old girl from England. Now I'm 1 in a middle school.I have to say that I was not good 2 my lessons before. So I was always afraid of exams.

    Last week I 3 my end-of-year exams. Today I got my report card. 4 ， I did very well. My mom and dad said it was the best report. It was 5 main subjects that the report card talked about， and I felt very 6 today. My teachers ticked( 给…打勾 ) “7 to improve”，“Good” or “Very good”. My English teacher said my English was much better. For math and science I also 8 “ Very good” ticks. All my teachers said I was 9 And at the end of the report card my head teacher said， “A very good 10. Well done!” I am so pleased with it，but I hope I can get a better report next year. I'm sure I can.

“王师北定中原日，家祭无忘告乃翁。”这句诗表达诗人什么样的感情？