Li Lei:
How many members are therein your family?

你们家有几口人?
Wang Fei:
There are four of us altogether. My father, mother, brother and I.

一共四口,我爸、妈、哥哥和我。
Li Lei:
How old are you? Can you tell me?

你多大了?能告诉我吗?
Wang Fei:
I’m seventeen.

我.. 17了。
Li Lei:
How old is your brother?

你哥哥多大了?
Wang Fei:
He is five years older than me.

他比我大.. 5岁。
Li Lei:
Then your parents are in their fifties. Am I fight?

那你父母今年.. 50多岁了,对吧?
Wang Fei:
Yes, I think they are.

我想是的。