阅读下面的对话，然后判断正误。
Mike and John: Happy birthday to you, Sarah!
Sarah: Thank you.
Mike: How old are you?
Sarah: I'm nine.
Mike and John: Here you are, two bags and some dolls(玩具娃娃)．
Sarah: Thank you. How many dolls?
John: Four dolls.
Sarah: Let's eat the cake.
Mike and John: Great!
