Fixed phrases with prepositions

If you don't turn up for the exam you fail ____ default.

She's ____ her element when talking about fashion, it's what she loves.

In this game you have to solve a clue which ___ turn leads you to the next clue.

If I really have to I can swim 100 lengths of the pool ____ a stretch

She worked ____ vain to save the plants but the wind and snow killed them.

____ all accounts it's going to snow today.

It's ____ no means sure we'll win the cup

When I´m ___ a loose end I enjoy doing some gardening

You can't cancel the party ____ such short notice, people will be upset

____ first glance the shop seemed closed but actually it was open.