Help me choose a package
I am newly arrived in China, and I speak at an advanced intermediate level (I think). I can hold normal conversations, but i need to learn lots of combinations. So I need some help choosing a package that
(1) I can listen to for 30 mins a day on my iPod/iPhone (while I commute to work) and
2) teaches me combinations at this level (结余，编制，大约，集中，判断，机构，分子，网络，成本，规范，具体，简介，使得). These are combinations that were new to me at a recent meeting that I attended.
3) I am American Chinese, so my pronounciation and listening ability is pretty good. I just don't have practical experience.
Which package of these three will be useful: Basic, Premium, or Praxis?
Thanks very much to everyone.
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