A rival claimed Wainhouse only built the tower to keep an eye on his activities.

They kept a check on all our activities.

He wants to keep an eye on the Penguin's recent activities.

More than one spectator in the Prince of Wales's box kept watch on their activities.

The Dominican armed forces are keeping a close watch on their activities.

He was still a suspect as the bomber, and now they would no longer be able to keep an eye on his activities.

I am within my rights in ordering detectives to keep full check on your activities.

Each campaign will now have to keep tabs on the other's activities, something they say they can do through the agencies that place ads.

If nothing else, all those spies would keep watch on my friend's activities.

Don't keep extensive notes on your activities and contacts.