11.   But the ranks of frozen embryos raise a host of legal, emotional and ethical questions.

12.   But the scientists say they are acutely aware that their research raises a host of troubling questions about reproductive technology.

13.   But the spread of elk husbandry has raised a host of problems in Montana and in other states.

14.   But, they said, the ballot counting in Florida raises a host of important questions about holes, individual will, rational choice and other philosophical matters.

15.   But using the tests to select an embryo as a tissue donor raises a host of new ethical questions.

16.   Clearly, though, using genetically modified bacteria in clothing could raise a host of safety issues that would have to be settled before any company would begin production.

17.   During the private meeting, the Pope raised a host of American policy issues over which the White House and the Vatican are split.

18.   European nations also raised a host of legal objections to previous proposals.

19.   For all that, the size of the bid and unlikely nature of the bidder raise a host of questions.

20.   His comments raised a host of objections from the students.