Hang on, I'll be right back.

Please keep your belongings with you on board.

He was denied entry on the grounds that he didn't have a valid visa.

On the whole, I think the project was a success.

It is important to act on your principles.

I need to get on with my project and finish it by the end of the week.

On the one hand, I want to go on vacation, but on the other hand, I have a lot of work to do.

Hold on tight to your dreams.

I put on my coat before going outside.

Decisions should be made on the basis of facts and evidence.