The film was extremely difficult to find for many years.

Do we make law because of a few extremely difficult cases?

To go from where we are to the next level will be extremely difficult.

As with people, language can be extremely difficult to learn at an older age.

You find it extremely difficult to think of us as anything but children.

There are many extremely difficult problems involved and I have less than a year left to work on them.

We would have an extremely difficult situation on our hands.

He must have been extremely difficult to live with for the last year or two.

Everyone is living in someone else's house, and trying to sort things out could make the whole situation extremely difficult.

Getting in and out of the place is extremely difficult.