Hello! I think I have changed.
First, at the past, I'm very short, but I'm very like basketball best, so I'm exercise every day! At present I'm tall and I can play basketball very well!
Then, at the past I don't like study hard, but at present I study hard and every exam I make big!
Last, I think I have changed very big, I'm obedient and active!
Everyone think I'm changed too! Now nothing in the word is different when you practies hard!