It was an impressive demonstration, but a somewhat ironic one as well.

It was described as "the most organised and impressive demonstration by the reform movement to date."

In the last few days we've seen some impressive demonstrations of reality control at work.

"An impressive demonstration," one of the other Russian leaders mumbled angrily.

Again, a most impressive demonstration of what can be achieved by a mobilized independent press.

It was another too impressive demonstration of his ex-traordinary powers.

It was an impressive demonstration of what can now be done.

But what we're getting, instead, is yet another impressive demonstration that these days, truth is political.

This report is an impressive demonstration of the fact that the controls are constantly improving.

This region saw the most impressive demonstration of what a hurricane can do.