That's why you were so hot to put her under surveillance.

The letter led to him being put under surveillance by the police.

And so, more than two years ago, he was put under surveillance.

And they can use those cameras to put people under surveillance.

Their potential capacity for violence determines whether they are put under surveillance.

Members of the task force put him under surveillance for three weeks.

The company often put work areas and quarters under surveillance.

"It's a good thing we decided to put you under surveillance."

Due to his activities, the Chinese authorities put him under surveillance.

The police said they would put him under round-the-clock surveillance.