"The fact that these things will no longer be kept under cover is very useful."

They've tried to keep them under cover since the war.

Or, at the very least, to keep it well under cover.

Then keeping under cover he went down the mountain to the river.

They can keep themselves under cover and be on us!

But get the men who are watching the house, and keep them under cover.

And suppose the information should be something you would want to keep under cover?

It might be well to suggest that they keep under cover.

But part of his game is to keep under cover.

I'm going to keep her under cover for the time being and I appreciate the information you've given me.