She is always on the ball and never misses a deadline.

She always puts on airs and acts like she's better than everyone else.

He always hits the nail on the head with his comments.

As a team leader, it's my job to oversee the project and make sure everything is on track .

Do you have something on your mind?

She is on the mend after her surgery.

I need to check on the progress of the project.

The defendant is currently on trial for the murder charges.

I don't think it's right to listen in on other people's conversations.

He is on the run from the police.