It was such an obvious precaution that it couldn't be taken for granted.

I could, however, survey my defences, such as they were, and take a few obvious precautions.

It seemed about time to start taking a few obvious precautions, anyway.

Madrid is pretty safe if you take the obvious precautions.

A. You can take certain obvious precautions, of course.

So doing these obvious precautions, there is no danger at all to people.

God, how could they possibly have overlooked so obvious a precaution?

And yet I had omitted just one obvious precaution.

To lay newspapers on the floor would be an obvious precaution.

The obvious precaution they are advised to take before they buy the house is to have it inspected.