That was challenging.

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

Challenging gender based violence

This is challenging work to do.

It's not very challenging any more.

Something is very challenging to me.

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 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.

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.

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.

The power of these corporations is challenging traditional State powers.

Challenging a man that you were jealous of without cause.

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.

The parameterization of these processes in chemical transport models remains challenging.

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

The U.S. Attorney is in fact vigorously challenging the Judge s order.

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

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

It's challenging, I admit, but doesn't that make it more interesting?

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.

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.