I have been looking for any site offering prepared question banks for English Language assessment test. Do you know any?

I hope that will help you http://www.cambridgeenglish.org/test-your-english/  http://englishenglish.com/englishtest.htm  http://examenglish.com/leveltest/grammar_level_test.htm  http://www.world-english.org/english_test.htm  http://www.mde.k12.ms.us/student-assessment/student-assessment-practice-tests 

The question is very important and will help a lot

i waiting for the interaction of experts

Hi. I use ESL Lesson plans as well as Home Cambridge ESOL Teachers resources.

Try these sites as they should help you

Good Luck