7.-At least I could have gotten a more interesting stand-in than James. Do you know how hard it is to find a good fake boyfriend on short notice?
-Well, he was smart and fun at tea yesterday, and he's really cute, too.
-You don't have to lie anymore, Serena, he served his purpose. Now that Chuck on his way back to the city, I can dump James just in time to go to the white party stag.

stand-in:替身

on short notice:在仓促的情况下

serve one's purpose:符合需求，解决问题。这里表示“他可以功成身退了”。

stag:to go alone

8.-So you think James is and untalented Mr. Ripley?
-If you want entrees in upper class, there's no easier mark than a wronged woman. It's time to call in the big guns.

Mr. Ripley: Matt Damon曾经演过一部片子，叫做The Talented Mr. Ripley（天才雷普利），Matt扮演的雷普利冒充贵族身份，混迹于上流社会。

wronged:被辜负的，失意的人

big gun:大人物，有手段的人

9.You wanna check out the competition.

调查竞争对手，这里指的是看看情敌长什么样子。

10. It's no wonder you hate "charade". It's too close to home.

难怪你讨厌那部电影，简直就是你的心声，简直就说到你心坎里去了。