for my dear colleagues and for our beloved students
i continue the comprehensive series of exercises
hoping that you will like it
unit 6
here's the link
http://www.4shared.com/file/143990580/9231db6e/Unit_6.html
and soon unit 7
Mr Ahmed Abd Al Samea
these exercises are complied from different sources

thaaaanks alot

مشكوووووووووووووووووووور ياباشا