Use of "the"

In the last GWC class, we learned different usage of "the."
The first one is anaphoric use, which indicates the word is previously mentioned, and another one is the cataphoric use, which indicates the word is mentioned afterward in the sentence.
For example, these following sentences quoted from the text, Mcdaniel, shows two different use of "the."

The Japanese are more relaxed and expressive within their in-group. Away from the in-group, however, the use of body language is usually remarkably restrained(anaphoric).

The ability to understand and be understood is central to successful cross-cultural activities(cataphoric).

I have always used "the " without being conscious about its work, but I'd like to take more care with its usage from now on.

First GWC Class

Hi, I'm Yuri Tamai, from  section 3H. I'd like to start my blog as a task of GWC class from today.
I'm living in Saitama city, and it takes two hours to commute to ICU, but I'm doing all right and never late for classes.
I belong to Tea Ceremony Club, and practice it almost every week.
I like reading and playing the piano, and I stay at home on almost every weekend.

My ARW teacher in the spring term was Dan, and I did make a blog, e-portfolio, google group, Grammarly, Evernote, and so on. So I think I'm used to this kind of task, and I can help it to some extent, so please ask me if there is something not sure.
And see my another blog if you like it.  http://tora10275969.blogspot.jp/

In the last GWC class, we set up some useful tools; Grammarly, Blogger and e-portfolio. I think these applications are very useful to English learning, and look forward to learning grammar with using them.