聪聪陪爷爷在公园健身时,偶遇了华华和她的奶奶。请选择正确的句子帮他们完成对话。:{#blank#}1{#/blank#} :{#blank#}2{#/blank#} :{#blank#}3{#/blank#} :{#blank#}4{#/blank#} :{#blank#}5{#/blank#}
A. Hi, Grandpa Zhang. This is my grandmother, Li Mei.
B. I'm 55 years old. How old are you?
C. Hi, Huahua. This is my grandfather, Zhang Li.
D. I'm 55 years old, too.
E. Hi, Li Mei. How old are you?