11.   But among those students a considerable number have great difficulty with the university course.

12.   But if you are having difficulties, I suggest you drink only bottled water and avoid salads.

13.   But it had obvious difficulties for many students who found they could not manage both love affairs and study.

14.   But the economy has difficulty adjusting to that idea.

15.   By Monday the roofs of the town were wearing thick white hats and the traffic was having difficulties.

16.   By the age of eight, Robbie was having difficulties at school.

17.   Cavalli had no difficulty knocking the work of other composers into a cocked hat.

18.   Does she have difficulty carrying out complex motor patterns?

19.   Far from cultivating a golden tan, I had difficulty in keeping the rust at bay during a particularly wet summer.

20.   Finally, the managers had difficulty confronting the possibility that, in part, they might be the source of the problem.