Dear friends, 
recently I've come across a very useful file in the Internet. It can teach you a lot, decide your doubts about confusing words, present grammar patterns logically and illustratively.

here is the logo 

  and the address:

http://enginform.com     

for the incoming lexical material  watch your page 11* Intermediate.

Hope, you could value the dicovery.

love, N.A.