31.   Roll the fish in breadcrumbs and grill it for half an hour.

32.   Roman had said half an hour and he was quite capable of walking in on her if she was late.

33.   Someone came in half an hour ago and bought up our entire stock of Italian wine.

34.   Steve turned up half an hour late as usual.

35.   The final speaker overran by at least half an hour.

36.   The judges deliberated for half an hour and returned with a unanimous Decision for Groton.

37.   The play was awful and we walked out after half an hour.

38.   The xenon atoms remain polarised for about half an hour.

39.   They reached the edge of the city half an hour later.

40.   To get some real benefit from the exercise, you should continue for at least half an hour.