选择合适的选项补全对话。

A．My mother is younger．   B. What about your brother?    C．How old is your sister? D．Is your brother taller than you?

John: Hi! How many people are there in your family?

Amy: Five. They are my parents, my brother, my sister and me.

John:

Amy: My sister? She's twenty years old.

John: What does she do?

Amy: She is a student.

John: How old is he?

Amy: He's fifteen years old and he is a student. too.

John:

Amy: Yes, he is much taller than me.

John: Who's younger, your father or your mother?

Amy:

John: Thanks very much.

Amy: That's all right.