任务型阅读（共5小题，每小题1分，满分5分）
英语中有许多俚语在日常生活中被广泛使用。请阅读下面几则俚语和它们的意思，完成1-5小题，使句子完整、通顺。请将正确的俚语填入空白处。

You bet: of course pig out: to eat a lot Jock: someone good at sports couch potato: a person who watches too much television party animal: someone that loves parties or go out to clubs

 
David has been partying every night this week. He is a ______.
You’ve been watching TV all day. Don’t be such a ______ and get up!
Even though I’m on a diet, I still like to ______ with my friends sometimes.
– Could you help me solve this problem?   – ______.
John runs very fast. He is the biggest ______ in our school.