categories to show full post

Hi,

I have few categories on my website like about us, contact us and under each category I have one post (that is based on the category).. when I click on category it only shows few lines from the post. How can I get full post listed….

This is the website: http://www.qagroup.ca

click any category like about us and it just shows few lines.. Can I get full post to show when i click category instead of clicking again on on About us that is a post tile..

Thanks…