mp4

I want to buy a MP4,however,I do not what a good brand of MP4.give me hope that we can recommend some good Mp4,prices are below500,sound quality is batter,thank you.

I need help,I would like to better my English.

My English is very poor,however,I would like to learn Engliah. In the present society more and more important in English,so I would like to learn English,I am about to enter the University of,I...