1. The Greens live on the ninth floor of the building.(格林一家住在这栋楼的第九层。呵呵~live打错了哦~)2. Today is the little girl's twelfth birthday.(今天是这个小女孩的十二岁生日。)3. Is April the fourth month of a year?/ April is the fourth month of a year.(四月是一年中的第四个月吗?。。。。这个问题问得好白痴。。/四月是一年中的第四个月。)