读一读，补全对话。
A. What about you?
B. How old is your cousin?
C. Do you have any cousins?
D. What is his name?
Ann: Hi! Mike.{#blank#}1{#/blank#}
Mike: Yes, I have one cousin.
Ann: {#blank#}2{#/blank#}
Mike: He's 9 years old. {#blank#}3{#/blank#}
Ann: I have one cousin, too. He's a boy.
Mike: {#blank#}4{#/blank#}
Ann: His name is Dan.He is 10 years old.
