— Mike, what did our monitor say just now?

— Every boy and every girl as well as the teachers who _____ to visit the museum _____ asked to be at

   the school gate before 6:30 in the morning. [ ]

A. is ; is

B. are; are

C. is; are

D. are; is

患者，女，75岁，上下牙全部缺失，下颌弓明显宽于上颌弓，其他未见异常

正确的排牙方法是（）

A．左右两侧后牙都排成正常

B．左右两侧后牙都排成反

C．左侧后牙排成反，右侧后牙排成正常

D．左侧后牙排成正常，右侧后牙排成反

E．应将后牙右上与左下，左上与右下对换位置排牙