21.  A better plan would be to launch from Earth on a trajectory optimized for transfer to Mars.

22.  A better solution is for automakers to develop air bags that inflate more slowly, lessening the risk of injury.

23.  A big attraction of the West Country for many second home owners is the opportunity it offers for waterside living.

24.  A big crowd is expected tomorrow for the final match.

25.  A big oblong for the managing director, six medium ones for the directors, a dozen small ones for the salesmen.

26.  A big property developer has put in a bid for the land.

27.  A big reason for the Decrease in smoking is the ban on cigarette advertising.

28.  A big unknown is the fate of federal support for wind power.

29.  A bigger fact in history than so-called historians give credit for.