This was a useful exercise put on by well-informed, thoughtful people.

This is a useful exercise for the person reading it, too!

On several occasions, I found these exercises quite useful and fun at the same time.

A variety of useful and interesting exercises to follow every reading passage.

If you are in a relationship, asking your partner how he or she would respond to the suggestions listed above is a useful exercise.

Learn more about these fun and useful exercises that keep your memory in tip top shape.

In my opinion, the 1998 discharge was a fascinating and at the same time useful exercise.

I am sure we will not agree with every single detail in this report but that would be a useful exercise nevertheless.

It is a useful exercise to put - and answer - the obvious question: "What are we arguing about?"

And having to run for the bus gives me some useful exercise.