11.   Investors said the confusion highlights the difficulties of doing business in Russia.

12.   So far, negotiations have only highlighted the difficulties that individual nations have in doing so.

13.   The case highlights the difficulties that judges, prosecutors and defense lawyers face in domestic violence cases when the victim does not cooperate.

14.   The case highlights the difficulty of people in prison in obtaining DNA tests.

15.   The difficulties were highlighted in a visit paid this week by Malcolm Rifkind, the British Foreign Secretary.

16.   The discovery last year of StarLink, an unapproved variety of genetically engineered corn, highlighted the difficulties in separating crops with different traits.

17.   The report carries no force but highlights the difficulties that the United Nations has in gaining support for increasingly complex and dangerous peacekeeping missions.

18.   The varying stands taken by the unions highlight the difficulties that often prevent management and labor from working together in the airline industry.

19.   Their opinions highlight the difficulties of getting wide bipartisan agreement on how best to reform the system.

20.   With both sides unwilling to budge, the standoff has highlighted the difficulties that can arise when old wounds come up against new freedoms.