答案解析：
D
这里说的是Rachel一不小心告诉Ross他的小孩的性别是“男性”。原本一直装不愿意知道的Ross一下变得非常激动。而其他人其实早就知道了这个消息。于是，我们选择 D，显然其他男士没有Ross激动。

听力原文：

Ross: Uh, no, no, see, because not...not all guys are going to be a Paolo.
Rachel: No, I know, I know, and I'm sure your little boy is not going to grow up to be one.
Ross: (astonished) What?
Rachel: What?
Ross: I-I'm, I'm having a boy?
Rachel: Uh...no. No, no, in fact, you're not having a boy.
Ross: Wha-I'm having, I'm having a boy! (babbling) Huh, am I having a boy?
Girls: Yes, you're having a boy! (Monica runs over and hugs Ross)
Ross: I'm having a boy! Oh, I'm having a boy! (Joey and Chandler run in)
Chandler: Wha...
Joey: Wha...
Joey and Chandler: What is it?
Ross: I'm having a boy! I-I'm having a boy!
Joey: Hey!
Chandler: Hey!
Joey and Chandler: We already knew that! (they hug)
Ross: I'm having a son. Um...