Air Conditioning

Some of these are giving me trouble because I feel like they could go either way. If anyone could assist me that would be great. Thank you. Directions: Make any necessary corrections to the following sentences. If the underlined words are written correctly, write OK. Example: Please have all applicants for the administrative assistant position take a five minute keyboarding test.
five-minute 1. We must bring our customer records up-to-date by the end of this month.
2. The Boston-Miami flight is scheduled twice daily on weekdays. 3. Next month we are scheduled to replace the two slowest-printing printers in our department. 4. Only Oklahoma-University students were issued tickets to the musical production. 5. Our manager, Mr. Allen, is one of the most kind-hearted people I have ever met. 6. All our charge-account customers have already received advance notice of our July linen sale. 7. Too many long-winded speakers at this banquet could cause a low attendance at tomorrow night’s banquet. 8. The First Lady’s recent visit to England bolstered British-American relations. 9. Three of these programs are government-sponsored and will expire at the end of 2010. 10. The air conditioning equipment in our building broke down yesterday.
I think I got most of them, just not the Boston-Miami one.