21.   This deceptively simple question surrounds any Rolling Stones tour, including the current Bridges to Babylon tour.

22.   What impact this will have on the U.S. stock market remains largely obscured by questions surrounding the prospects for Asia.

23.   Whether the nerves could be fully repaired was the biggest question surrounding the reconstructive surgery performed by Bert Zarins at Massachusetts General Hospital.

24.   While few questions surround the offense and quarterback Jeff Lewis, the defense has a big load to carry in the scoring-happy Big Sky.

25.   While Martinez is two years removed from surgery, questions surround his effectiveness.

26.   Bush was reading extensively about the ethical, scientific and moral questions surrounding embryonic cell research, said the adviser, who spoke on condition of anonymity.

27.   But many questions surround productivity.

28.   Many questions surround the intentions behind the selection of such a theme.

29.   Questions surround the futures of Brett Hull or the Grumpy Old Men line of Mike Keane, Kirk Muller and John MacLean, all of whom become free agents.

30.   Susan Howley, director of research at the Christopher Reeve Paralysis Foundation, cautioned that many questions still surround the new technique.