Q: Which of the following does not explain the situation?
A: There is a cat in the house.
B: Rachel knows little about Paolo.
C: Ross is jealous of Paolo.
D: Rachel keeps touching Paolo.
解析：A。A不正确，在原文中有“The cat,… the cat turned out to be Paolo’s”，说明他们之前相识是因为一只猫，但是这只猫现在不一定在场。B正确，从“Oh... Italy, I think.”推断。C正确，整段对话都有这个基调，尤其是最后一句“That, that is funny... (to Joey).... and Rachel keeps touching him.” D正确，从touching him，可以听出这就是他们对话中提到的Paolo。实际上这是Rachel刚领Paolo进门，Ross向Rachel提问，此时Rachel正和Paolo手挽着手。
Ross: (jealous) So, um... where did Paolo come from?
Rachel: Oh... Italy, I think.
Ross: No, I mean tonight, in the building. Suddenly. Into our lives.
Rachel: Well, the cat... the cat turned out to be Paolo's cat!
Ross: That, that is funny... (to Joey).... and Rachel keeps touching him.