[案例]曹老伯晚年经营个体杂粮买卖,收入颇丰。2001年10月与洪女士再婚后,先后购置了两套3居室楼房。为防止日后引发纠纷,曹老伯与洪女士在3年前当着自己儿女的面,口头约定这两套楼房他和洪女士一人一套。洪女士表示同意。2014年11月,曹老伯因突发重病住院,经医治无效于住院的第5天死亡。曹老伯于病重期间亲笔写下书面遗嘱,内容是将属于他的那 [Case] ​​Cao old man in his later years trading in grains, income quite good. In October 2001 and Ms. Hong remarried, has acquired two sets of 3-bedroom buildings. In order to prevent disputes in the future, Cao and his wife, Ms. Hung, confronted their two children in front of their own children three years ago. Ms. Hung agreed. In November 2014, Cao’s wife died of sudden serious illness and was ineffective on the 5th day of hospitalization due to medical treatment. Cao old man wrote a written testament in the serious illness, the content will belong to him