I don't realize that I've been at senior school for three years until now.Looking back into the years,What shall I say?It consisted of both happiness and sadness.Life always gose like this,up and down,as is so exciting.Now when I recall the past,no matter how I felt at that time,they are all tueasures for me.Everything has passed.I've stored them at the bottom of my heart.I am in the third grade already.Yet much needs me to challenge.On the way,there's both happiness and distress.However,I will go ahead just all the same.