That was challenging.

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

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

These have indeed been very challenging times for our Organization.

Challenging gender based violence

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

The past year was indeed very challenging for the humanitarian community.

Safe and reliable enhancements for clearance productivity remain a challenging requirement.

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.

This is challenging work to do.

It's not very challenging any more.

Something is very challenging to me.

Successful completion of the preparations for the summit is a challenging task for all of us.

It means challenging what we take for granted, things that we think are obvious.

The year 2004 was a challenging one for both the organization and its staff.

We meet at a particularly difficult and challenging moment for disarmament and non proliferation.

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.

Transporting wave generated electricity inland would be challenging.

But it's relatively challenging for astronomers who want to look through the atmosphere to astronomical sources.

PM What's the best part of working with your mother, and the most challenging part for you?

And as for those who strive against Our revelations, challenging, they will be brought to the doom.

And as for those who strive against Our revelations, challenging, they will be brought to the doom.

The past year was particularly challenging for achieving the objectives of disarmament, arms control and non proliferation.

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.

There's something frightening but also challenging about this school.

We're putting this enormous load on them for three or four days and it's very challenging, Mora said.

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

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

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.

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

This has been particularly challenging in remote and insecure areas.

The power of these corporations is challenging traditional State powers.