Seeing what I had done, ...

　I could also see satisfaction in sb.'s eyes.

　Tired as I was, I never felt so happy.

【参考范文】

Sunday, March 13, Fine

　　I'm a 17-year-old middle school student. Being busy with my studies, I seldom helped my parents with the housework. I always feel sorry for that.

　　Today when my parents went out shopping, I suddenly got an idea: why not give the rooms a thorough cleaning? Firstly, I collected all the things lying about in the rooms and put them in place. Then I wiped the dust off all the furniture. After that, I swept and mopped the floor.

　　At this very moment, my parents came back. Seeing what I had done, my mother gave me a hug. I could also see satisfaction in my father's eyes. Tired as I was, I never felt so happy.