Hello,
Today, I finished the capter 5 of OPD book by PDF file located in the site salam zaban. it’s diffcult to study with PDF, because the book should be beside you, always. having book !! it’s a way to think in english better. I try to start studing lesson 6 (level 1) tomorrow .
thanks a lot.
salamzaban:
you can buy its book from Salamzaban: