Exact(8)
Both of these options pose difficult problems.
The choices each pose difficult foreign policy questions.
But the world outside America's borders continues to pose difficult challenges for Washington policy makers.
Continuous innovation will pose difficult challenges for people and governments the world over.
They also bear some responsibility for the growing volatility of global financial markets and pose difficult questions for regulators.
Patients with advancing dementia experience significant psychiatric and medical comorbidities, which can pose difficult management issues for relatives and attending physicians.
The delay is a tacit admission that the regulations pose difficult political, economic and technical challenges that cannot be addressed on the aggressive timetable the agency set for itself early in the Obama administration.
As elsewhere in the world, these giant agglomerations pose difficult social and aesthetic problems, but, by concentrating population, they help to prevent some areas of the countryside from becoming too built-up.
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