11.   There was an exchange of fire during which the gunman was wounded.

12.   Free exchange of goods was advantageous to all.

13.   On culture, student exchanges would be increased and reciprocal cultural and information centres opened in Washington and Moscow.

14.   The World Bank, the IMF, commodity exchanges and so on are mostly driven by the interests of the TNCs.

15.   He wondered if a three-cornered exchange might be more enlightening.

16.   For two reasons, however, we feel that such exchanges were not an important confounding factor in our patients.

17.   In the UK syringe exchange is more readily available.

18.   The scope for the retention of this kind of information exchange is not significantly better or worse today than it was then.

19.   Such a debt-for-nature exchange would be the largest of its kind to date.

20.   Most share-for-share exchanges are self-evidently bona fide commercial.