31.   But it represents the greatest single doubt that surrounds the merger plan of Hewlett-Packard and Compaq, and the biggest obstacle to winning shareholder approval for the deal.

32.   But perhaps the biggest obstacle is persuading members of the technology community to work together.

33.   But no matter how much progress Keiko makes, the biggest obstacle remains convincing a very reluctant Iceland government to take him back.

34.   But the biggest obstacle to widespread organic farming in Britain is the structure of agricultural subsidies.

35.   But the biggest obstacle is the mayor himself, who promises Vianne that her shop will be closed by Easter.

36.   But the biggest obstacle Latino Vote USA faces is voter alienation.

37.   But the biggest obstacle was recruitment.

38.   But the biggest obstacle is likely to be price.

39.   But the biggest obstacle to a Kennedy return might be Kennedy himself.

40.   But the biggest obstacle turned out to be an egg salad sandwich.