In this days i am studying Chinese at Anshan Normal University, so, as a diligent student, I am doing my best in study quickly and having good marks 
So, I created some chinese exercises for my personal use, but i let the entire Internet community to use them
And also, you can try to listen the chinese voice, on the speech synthesis page 
If you find something wrong on that pages, don't hesitate to contact me on the forums, you don't need even to make a login!