翻译几句句子。请不要机译。

He was shy and unsure of himself when he first started college/university.
I've never experienced this kind of situations before, I really don't know what to do.
There is sometimes real danger to the work of fire fighters.

He was shy and not self-confident when he went to college at first.

I have never been in such a situation. I'm at loss and don't know how to deal with it.

The job of a firefighter can sometimes be very dangerous.