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The most challenging thing is surgery.
I always found the most challenging thing in photography was the next think I was going to photograph. What I had done was in the past and behind me, the future was always a challenge.
the most challenging thing is getting everything right! you get one thing but then another just slips away.
the most challenging thing i had expereinced in my life was when i got drunk it was not that easy because i wasa not prepared.
probably the babies dying would be the hardest part of that paticular job
Paper writing.
If you have your own practice, the most challenging thing would probably be dealing with the insurance companies because in today's world you will have to really jump on insurance companies when trying to get their payments. If you don't have your own practice, it would probably be very worried parents. :)
Leaving my boss breathing.
The most challenging trail at Whistler Blackcomb is the Couloir Extreme. Another famously challenging trail is the Big Bang. The most challenging trails are these two.
You think that the most challenging part of this unit will be?
most Egyptian "builders" were slaves.
individualism