根据短文内容及所给提示，在文中的空白处填写一个正确的单词。
June 15，2018
This morning I took a bus to school. The traffic was ____ (busy) than usual and there were more people on the bus. At Xinhua Stop, I saw ____ old man get on the bus. He looked very weak. I stood ____ and gave my seat to him. He thanked me and asked me about my name and my school. We talked ____ (happy).
Later in the ____ (three) class, Mr. Du came in and asked me to go to the front. I didn't know w____, so I was a little afraid. Everyone was looking at me. Then he told ____ (they) what I did on the bus this morning. He ____ (know) it because he got a phone call from the old man. Mr. Du said I could be a good example to my ____ (classmate). It was really a good day f____ me! I was so proud.
