The phrase "a host of difficult" is not correct as it is incomplete.
It can be used when referring to a large number of difficult tasks, challenges, or situations, but it needs to be followed by a noun to be complete.
Example: "The project presented a host of difficult challenges that the team had to overcome."
Alternatives: "a multitude of difficult" or "a variety of difficult".
Moving to the kind of single-payer model that Sanders envisions would require a host of difficult choices.
As my colleague James Surowiecki pointed out earlier this week, such a transition "would require a host of difficult choices.
There are a host of difficult challenges to be tackled to get to universal access but above all, our experience tells us that we need to do something about finance.
But maybe I'll be lucky and win a couple races.'" As with any successful sportsman, retiring from a world around which a whole life has been forged entailed profound adjustments and raised a host of difficult questions – not least the question of what to do next.
Visitors to Bilbao are dazzled by the stunning originality of Mr. Gehry's exuberant forms, but the building's artistry also resides in its ability to solve a host of difficult planning issues, from channeling an existing rail line through the structure to crowd control.
If confirmed by the Senate, Mr. Pitt will face a host of difficult regulatory issues arising from globalization of the securities markets, like whether to accept foreign accounting standards, and from advances in technology, like the migration of securities trading from the exchanges to the Internet.
Livermore's key project, the National Ignition Facility (NIF), faced a billion-dollar-plus cost overrun and a host of extremely difficult technical problems (Science, 18 August 2000, p. 1128).
Such relations have some curious features, and they raise a host of puzzles and difficult questions most notoriously: Can they be explained in terms of natural (causal) relations, or do they have to be regarded as irreducibly non-natural aspects of reality?
Because we have no telemetry from the station, we only know what we can observe from outside the station (like Fraunhofer's radar imagery, shown above), and a host of variables make it difficult to say anything with certainty.
As discussed, dementia usually happens as a result of mixed pathologies and in the context of a host of confounders that are difficult to simulate in the laboratory, including ageing, physical frailty and premorbid education.
In the region's most socially conservative countries – mainly in central Asia and the Caucasus – women confront a host of abusive practices which are difficult to root out, from bride kidnapping to denials of their reproductive rights.
