1.   A shortage of trained nurses is posing major problems.

2.   An interesting methodological and theoretical problem is posed by these contradictions.

3.   But it is unwise to assume that parents will inevitably pose a problem when they are placed first.

4.   For example, the modelling of the corporate sector, particularly allowing for imperfect competition, is likely to pose formidable problems.

5.   Getting money out of the business poses problems for people who own corporations.

6.   Helicopters, too, are complicated things and pose many problems.

7.   In convex economies these features do not pose existence problems.

8.   Indeed, how you measure something as sensitive as intelligence poses problems.