At the mention of her name Zeno grew alert.

Rand's eyes grew alert at the sight of it.

These officers have grown more alert to the ways in which local warlords may be using them.

While we were talking to him, he seemed to grow more alert.

He turned his head and looked back at the young Muscovite who had grown more alert.

His body had suddenly grown alert as he scanned a message on his desk.

Meanwhile she'd grown more alert, and begun thinking of escape.

Was it my imagination or did he seem to grow a little more alert?

At the movement, the seven men with bows grew alert in a drunken, amused way.

At the same time, young Web users appear to be growing more alert to danger signs.