the short answer is that they don't know. concentration: training drills are used that require a student’s full attention which bring quicker results since more time is spent on task. i am determined to maintain a high level of skill in this trade, and provide excellent customer service! field crops research 31(3-4): 233–252. they will thank you by coming back to play, by telling their friends and by giving you money. summer has arrived and so have your annoying neighborhood mosquitoes, who show up uninvited to every party. in may 2009, a festival of national crafts will take place. 