вставьте предлоги I took your bag instead of mine __ mistake.
They went __ a ten-kilometre hike.
Paula suffers __ a bad headache.
Can I put __ some posters?
Marathon runners want to raise money __ charity.
We sat __ the campfire.
Adam is responsible __ making banners.
I think you are mistaking me __ someone else.
I cooked some sausages __ the barbecue.
Why don't we gather and clean __ the pond?

I took your bag instead of mine by mistake.

They went on a ten-kilometre hike.

Paula suffers from a bad headache.

Can I put on some posters?

Marathon runners want to raise money for charity.

We sat up the campfire.

Adam is responsible for making banners.

I think you are mistaking me for someone else.

I cooked some sausages on (at) the barbecue.

Why don't we gather and clean out the pond?