It is certainly special in my mind, and one that has proven very productive.

"And if online proves more productive, advertisers have the option of investing less."

He breathed deeply and felt there was a good chance this one might prove productive too.

He is the one restricting the exchange of ideas that might prove productive.

Only then will a response avoid blunder and prove productive.

Fortunately some of my other sources proved more productive.

A new, more broadly based government could prove more productive.

Perhaps the current wave of couplings between companies in related businesses will prove more productive, but that is by no means certain.

The work was tedious, and in the nature of the case could hardly prove immediately productive.

But the question "tell me what an average working day for you looks like" has proven quite productive already.