How does this arrangement work?

There is a long line at this supermarket.

There was a long line at the station.

In medical class, I learned about the structure and function of the pudendal cleft.

He bought a new record disc.

He bought a new record.

This disk is my favorite album.

I had the pleasure of seeing your work.

He is good at typing on the keyboard quickly.

We have a watchdog at our house, protecting our safety at night.