among all kinds of TV programs,i like the "Discovery Channel" the best.This program is about popular science,technology,and history.It is very popular in China.Firstly,the program portrays history vividly,for example,its feature on old-time technology of China.Secondly,one will learn many new technologies from this program,one example would be the future of cars.These reasons mentioned above are why i like the "discovery Channel"very much.
feedback:
I think you have a good structure,you grammar however is not that good.if you want a good mark on the TOEFL exam,you need to work a little harder,let me know if there is anything you need help with.good luck!