You know the uni is the most challenging, so number ten is challenging.

That was challenging.

This is challenging work to do.

It's not very challenging any more.

Skepticism, because you must always be challenging.

DM She's very tough it's most challenging.

It's this immensely exciting and challenging problem.

That is an assumption that needs challenging.

In Japan, they say that sushi is challenging.

BC EDL is this immense, technically challenging problem.

However, the situation in Cité Soleil remains challenging.

But deciphering the script is a very challenging task.

It's going to be very challenging to deal with.

The selection of indicators has proven to be challenging.

Women challenging these norms are punished by violent means.

We live in difficult and challenging economic times, of course.

They're challenging the very notion of Western models of development.

It's a very challenging task. But more to come later.

You can see the trapezoids are a little challenging there.

And we as Africans need to start challenging our leaders.

Everything we do, we believe in challenging the status quo.

We express our gratitude for Mr Smith's outstanding, challenging speech.

In this challenging environment, administrative infrastructures have continued to function.

This has been particularly challenging in remote and insecure areas.

These have indeed been very challenging times for our Organization.

Indeed, we live in both challenging as well as exciting times.

And there were two types of laws that were particularly challenging.

Determining an optimal level of accountability for results is also challenging.

Some individuals and entities have filed multiple lawsuits challenging their listing.

The motion challenging the expert report was therefore not taken up.

Ongoing discussions

And this is a very challenging idea. It's a very challenging idea to mainstream media. It's a very challenging idea to anyone who has invested an enormous amount of time and expertise, and who has a lot of energy invested in the notion that he or she knows better than everyone else.

At the best of times, traveling between Indonesia's many islands is challenging.

Managing such a large and complex peacekeeping mission was a challenging task.

Summary of discussions

(c) Interactive discussions.

Working group discussions

So, really even challenging the notion of what can be considered a story.

And look what it does with its foot to get over challenging terrain.

Even the idea of us as a family was challenging to most people.

Trafficking within countries had become commonplace, challenging the usual definition of the phenomenon.

Tired diplomatic postures and ritual incantations are not what these challenging times demand.

In 2004, UNHCR maintained financial stability, although it was another challenging financial year.

In fact, it is a challenging concept for both developed and developing countries.

Collating, presenting and marketing tourism information is a challenging task for developing countries.