想要提升自身英语口语水平，就需要一定程度的词汇量积累，麦克米伦词典提到过掌握7500个词才算达到日常沟通基础需求，从VOA流行美语 Unit 111: to go off on someone/What开始一点点累积开始吧
VOA盛行美语 Unit 111: to go off on someone/What"s the deal
李华刚下课，走出课堂就碰上Larry。李华在和Larry 说话中会学到两个罕用语：to go off on someone 和what"s the deal.
(School building lobby SFX)
LH: Hey, Larry. 你刚下课啊？对了，我刚好要问你，明天你有没有见到Dave？
LL: Dave? No, I haven"t seen him anywhere since professor Jones went off on him yesterday morning.
LH: Jones传授对Dave怎样啦？你说他went off on Dave? 那是什么意思呢？
LL: To go off on someone means to suddenly get very angry at someone. "To go off " can mean "to explode"- for instance, something like a bomb or a gun can go off.
LH: 噢，to go off on someone就是忽然对某人大发脾气，就如同炸弹爆炸，枪支停火那样。那Jones传授为什么忽然对Dave大发脾气呢？
LL: Dave asked Professor Jones if he could turn in a paper a few days late, and Professor Jones just went off on him.
LH: Dave 怎样常常要求晚几天交报告呐？唉，也难怪Jones传授要go off on him对他发脾气了。Larry，你再给我举几个go off on someone的例子吧！
LL: Hmm, let me think. I remember when I was in Beijing I tried to pay a taxi driver, and he went off on me for several minutes. I had no idea why he was so angry. It turned out, what I gave him was a counterfeit note.
LL: Li Hua, have you ever gone off on someone here in the U.S.?
LL: She tried to cheat you out of a month"s rent? If my roommate did that, I wouldn"t just go off on him, I"d take him to court!
LL: So anyway, what"s the deal with Professor Jones lately? He always seems to be in a bad mood.
LH: What"s the deal? 你在说什么啊？deal不是买卖的意思吗？你是问我，Jones传授在和什么人作买卖？
LL: No, no, Li Hua. When I ask "what"s the deal", I mean "what is the situation?" I was asking why he is in a bad mood.
LH: 噢，我晓得了，what"s the deal就是咱们中文里常说的“怎样回事”。你方才是问我，Jones传授心境不好到底是怎样回事。我据说，他对往年没能升上正传授的职位如同挺绝望的。
LL: Really? What"s the deal with that? He"s been in this department for years!
LH: 就是啊! Jones传授在咱们系上教书也有好多年了，不给他晋升，终究是怎样回事，谁也不晓得。
LL: That seems to be unfair. Well, Li Hua, what"s the deal tomorrow night? Is everyone still planning to go together to that concert?
LL: Well, here"s the deal: I"ve got class until six thirty tomorrow, and the concert is at eight. It"s probably best if you meet me here at school, since I might not have enough time to pick you all up.
LH: 哼，你今天6点半才下课，而演唱会8点就开端。对，要你去接咱们恐怕是来不迭。那就照你说的吧，咱们到学校来等你！噢，对了, Ed今天不想去，他和Jill刚离别，不想和Jill见面。
LL: Really? What"s the deal with those two? I thought they were really happy together, but I heard that Jill went off on Ed the other night.
LH: 他们俩到底是怎样回事？谁晓得！大家都认为他们在一同很快乐。Jill 那天早晨对Ed大发脾气是由于Ed没跟她磋商就决议明年到国外去念书。
LL: Oh well. That"s too bad. Anyway, the deal tomorrow is you and your friends will meet me here at school, and we"ll all leave together. OK?
明天李华学到两个罕用语。一个是：to go off on someone, 意思是忽然对某人大发脾气。另一个罕用语是: the deal with something, 这是指状况如何，怎样回事。
想要提升英语口语能力，其根本是同主题英语材料的海量输入，即海量地听和读，VOA流行美语 Unit 111: to go off on someone/What就是从这方面来提升你的英语口语，如果想要更多关于英语口语的知识请关注知青英语