But his first and most important challenge is to define himself.

However, the most important challenge is on the side of human resources.

What are the important challenges and responsibilities of the central person?

Do such events not suggest that this is the most important challenge of our time?

Energy is one of the most important challenges we have today.

I think that is one of the most important challenges.

There are a number of important regional challenges that face us.

As we approach the year 2000, Europe is faced by important challenges.

This is another important, central challenge for the Europe of the future.

I think this is one of the most important challenges that our country has to face in the future.