What is the difference between the words: unreadable and illegible.. childish/childlike, intolerable/intolerant? How to use these words and how to make them out of context?

Could anybody please advice a good site to practise the usage of the articles in English language?

First notebook entry: Introducing myself My name is Marina, I work in a Bank as an accountant and study as well, to speak english excellent and fluently is my big desire, that's why I use any opportunity to improve my english skills. I'm really happy I found this great website because I can speak in english with native speakers and learn english by english teachers.