1.   A general rule is to attempt to close the sale when the buyer displays heightened interest or a clear intention to purchase the product.

2.   And authorities in many countries are expressing heightened interest in the latest methods for identifying people and keeping tabs on their activities.

3.   A show of this caliber is necessary now, he said, because of a heightened interest not only in Mies but also in modernism.

4.   Advances in technology, a boom in international marketing and heightened interest in entertainment are counted upon to support double-digit annual hikes in sales.

5.   Along with their heightened interest in Rhone grapes, forward-looking California vintners have also begun to explore the possibilities of some well-known Italian varieties.

6.   But even without those projects, heightened interest in the Charles is drawing more people to the water.

7.   But over the past year, my sense is there has been a greatly heightened interest in this subject, whatever the interests are, across a broad spectrum.

8.   Does the heightened interest mean the person likes what he sees or is irritated by it?

9.   Even the purported candidacies of Donald Trump and Warren Beatty are signs of a heightened interest, even passion, that has gripped this political season.

10.   Experts in teacher training say there are varied reasons for the heightened interest in teaching.