Billisthirt的精选

问题详情：完形填空。阅读下面的短文，掌握大意，从所给的A、B、C三个选项中选出一个最佳选项。   Billisthirtyyearsold.Heworksina(1).Heisateacher.Hegoestowork(2)MondaytoFridayeveryweek.Usuallyhe(3)atsixinthemo...