1.   This constitutes a fundamental challenge to the basis of the British planning system, and raises a host of thorny questions about the nature and efficacy of the system.

2.   And for investors, it raises a host of new questions about the future profitability of AIDS drug makers.

3.   And the practice raises a host of troubling ethical issues.

4.   But a new study raises a host of questions about the long-term health consequences of drinking even small amounts of alcohol while taking the hormone therapy.

5.   But as they exhort investors to make ethical choices and seek to improve corporate America, principled portfolios raise a host of questions.

6.   But computer and communications experts say the amendment is certain to raise a host of new legal and practical issues that arise with the basic nature of the Internet.

7.   But he would not seek congressional approval, his spokesman Joe Lockhart said, arguing that such a step would raise a host of constitutional questions.

8.   But it has also raised a host of new concerns for women with a family history of these cancers.

9.   But involving kids in drug trials raises a host of ethical questions.

10.   But opponents of therapeutic cloning raise a host of objections.