He was in the process of trying to close the office, a most difficult task.

Getting out of bed was a difficult task for him.

So far, you have done well at a difficult task.

The difficult task of working him in was left to Read.

With so many people involved, security was a difficult task.

As the author points out, that was a long and difficult task.

It will be a difficult task, but one which must take place.

She would take this one a single step at a time and do the most difficult task first.

We knew that was going to make the task a bit more difficult.

"But getting people to understand why I ran has always been my most difficult task."