Looks like the Great Firewall or something like it is preventing you from completely loading www.skritter.com because it is hosted on Google App Engine, which is periodically blocked. Try instead our mirror:
This might also be caused by an internet filter, such as SafeEyes. If you have such a filter installed, try adding appspot.com to the list of allowed domains.
A Series of Chinese Textbooks for Short-term Intensive Training Program For Foreigners.
Short-Term Listening Chinese Elementary, by by Mao Rui. Published in 2010 by Beijing Language and Culture University Press.
2nd Ed. List contains 10 lessons and 232 words. ISBN: 9787561929469