آزمون آنلاین زبان انگلیسی 1 - درس 3 | آزمون شماره 4187

The key to success is supposed to be hard work, but I think a strong …………… in your ability and in the purpose you are going to achieve is the most important of all.

  I have been able to .............................. many technology conferences around the world over the years like Google meetings and Microsoft conferences .