The question goes as above. Even though I've consult the dictionary, I'm still not sure about the answer, and I think either is ok. So I would really appreicate it if anyone could help me with that. Thank you. Sorry for the trouble again.
Last edited by emsr2d2; 14-Jan-2013 at 08:16. Reason: Typo
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.
Me too- if you use include, then it implies that the books contain 6 units and other stuff.
Thank you all.Words can't express how grateful I am.