Idioms: body parts

Mark obviously has a _______ for business investment; he has never lost any money yet.

I walked across to the photographers, shouting and yelling. I completely lost my _________________.

Colleagues regard Mika as a safe pair of ______________ who can be relied upon to step in when required.

It may happen, but I certainly wouldn't stick my _______ out and promise anything.

After five years' training for this event, he's head and ______ above the competition.

I had to bite my ________ when my manager took credit for my work.

I will fight _______ and nail to prevent any scheme which threatens local livelihoods.