PM to Dook answered
Further, without taking any side on this,
I myself try to master some more English by following this thread.
Street nor RAF slang do make that easy at some times, but I am willing to cope with that.
As it makes my vocabulary richer.
I deffo could figure out about the grades, but I may be an oik at not knowing exactly what an oik is.
But I think I have grasp of it now.
For the test leave me out of this.
SLB