Ask children to look alert and always take note of the people around them.

She looked alert and on top of things as usual.

They let me live because I looked alert, he thought.

He had called the left end's number and told him to look alert.

Silence sat up straight in his chair and tried to look alert.

They didn't look alert, but their presence was still a problem.

Most of the soldiers looked alert and normal, but some did not.

The man turned round quickly and tried to look alert.

Now it was time to sit up and look alert.

So I walked my post and tried to look alert.