heaps of errors

hi, there a quite a few errors in the grammar and culture parts of the course. In lessons 4.7 and 5.5 the audio doesn't always match with the pinyin in the vocabulary. There were some others too, though i don't remember which lessons they were in.

Hi there, I apologize for the inconvenience. I'll check it out and make sure the audio matches. Thanks for pointing this out to me. Lin