(2013•陕西卷)to celebrate the end of our exams，my friends and i went to a fast food restaurant.we __1__ hamburgers and coca cola at the counter.when our __2__ came，i started walking towards an empty table.by bad luck，my purse strap(带子) got __3__ on a chair and the tray(托盘) that i was holding slipped __4__ my hands and went flying in the air.the tray，and its contents，__5__ on a man who was just about to __6__ a bite of his sandwich.i stared，greatly __7__，as the drinks soaked(浸湿) his white shirt. then i
