Thanks a lot for the advice.
@ Bubel & @ 1tess:
Yes, I have already added the page widget before, but actually this is not what I wish. Secondly, the 11 pages ( the other 2 came with the theme automatically - archive and rss feed) will consist not only static pages. The main posting and update will be under the "latest news". And from time to time, the "Welcoming"page will always be updated, as well as the other pages according to their relevant issues. Since this page is only 4 days old, in the future, some of the pages will be gone, like "soft launch comment".
@panaghiotisadam and timethief:
I have infact added the links as both of your suggestions as well (see under "the happenings", linked as number 1-5). Initially, I thought this theme will immediately show the sub-pages content, once someone click the parents (here "the happenings"). In fact, it did happen once by accident, that once I click the parent "the happenings", it shows all the sub-pages content (exactly looks like the "archives" at the moment, showing all the previous posts or pages under "archive" as parent).
@1tess: Indeed my page does look very different from a normal blog, as it is designed to be a mixture of blog and webpage. Secondly, I would like to maintain the page very simple, clean and not fully jammed with words. So the bottombar is just perfect for me. Just another distinctive page, to put it that way:-)
Such a pity, that the sub-pages content could not come out directly on the parent page at the moment (or maybe by error). Not sure why the creator designed it in such a way or maybe it is just WP policy for WP.com
Again, thanks to all.