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She is working on a project.

The cat is sleeping on the bed.

He put on his coat before going out.

The book is on the table.

They are going on a trip next week.

The teacher is writing on the whiteboard.

She is standing on the platform waiting for the train.

The restaurant is on the corner of the street.

He is on the phone with his boss.

The children are playing on the playground.

Accepted authority rests first of all on reason.

Being alone means not inflicting yourself on others.

He studied for his degree on and off for 75 years.

The Times ran an article on it.

Well, you may have hit the nail on the head.

Trump tweeted again on Sunday about the issue.

Chu is currently on visit to the mainland.

Are we even on your list of priorities?

There's a few of us going later on.

Sales taxes, especially on essential items, are considered regressive.