You can practise listening comprehension here: www.elllo.org.
I have just been in US for two months, but I find that I could not even command my English at least as good as I did in China !
I find that is all because I can not understand native speakers very well, and further more makes me nervous, and I dare not open my mouth, and I become a little bit closed in this country. Please just give me some advice!
Thank you very much. I went there, and it is helpful