Going into Denver, he had to keep a sharp watch.

And had kept a sharp watch over her too, when she was doing Madame's room!

In any case, from now on they'd keep a sharp watch for survivors.

I'll have someone put on to keep a sharp watch on her.

My cousin keeps a sharp watch on every tilt, though.

Then it will be important to mount a sharp watch that he keeps this promise.

The librarians keep sharp watch on the young people, so they don't strain their eyes with too much reading.

Keep a sharp watch and relay when you Read them.

"Keep a sharp watch and advise me if anything comes up."

"Tell posts numbers six and seven to keep a sharp watch on the river."