I'm not sure what will happen down the line.

" That's my line - you can't steal my jokes!"

We need to set a base-line to measure our current performance against.

I don't like waiting in line for a long time.

It is important to toe the line and follow the rules.

I need to get in line for the concert.

We have to draw a line somewhere.

I'm sorry, I have another call on the other line. Can I call you back later?

Our troops managed to infiltrate the enemy line.

The Mason Dixon line separates the northern and southern states in the United States.