I think they are from Australia.
我想他们是澳大利亚人。
A What about that group? They’re speaking English, aren’t they?
A 那群人呢？他们在说英语，是吗？
B Yes. Let me try and listen to the accents.
B 是的。让我来听听他们的口音。
A British? American? What do you think?
A 英国人？还是美国人？你怎么看？
B No neither. They’re not British or American. I think they’re from Australia or New Zealand.
B 都不是。他们既不是英国 人也不是美国人。我想他们是澳大利亚人或者是新西兰人。
A So many tourists! Beijing and China are really popular these days, especially with the Olympics coming.
A 这么多的游客。北京和中国现在都非常受欢迎，尤其是奥运会要召开了。

Notes注释
1.You can talk about the different accents / accents in a particular language to identify where people come from, eg: He’s got an American accent / He’s got an American accent. He’s from London – he has a London accent / He’s from London – he has a London accent: They’ve got Australian accents / They’ve got Australian accents.
你可以谈论某种语言的不同accents / 方言，以辨别人们是从哪里来。例如：He’s got an American accent /他有美国口音。 He’s from London – he has a London accent / 他从伦敦来——他有伦敦口音。They’ve got Australian accents / 他们有澳大利亚口音。
2.You can talk about things in the future by using the phrase coming / coming, eg: Beijing is popular with the Olympics coming / Beijing is popular with the Olympics coming.
你可以用 coming / 即将到来来谈论将来要发生的事情。例如：Beijing is popular with the Olympics coming /随着奥运会即将召开北京越来越受欢迎。

Key phrases and sentences
What about that group? 
They’re speaking English, aren’t they?
Yes. Let me try and listen to the accents.
British? American? What do you think?
No, neither. I think they’re from
Australia or New Zealand.
So many tourists!
Well, Beijing and China are really
popular these days, especially with the
Olympics coming.

那群人呢？他们在说英语，是吗？
是的。让我来听听他们的口音。
英国人？还是美国人？你怎么看？
都不是。他们既不是英国 人也不是美国人。我想他们是澳大利亚人或者是新西兰人。
这么多的游客。
哦，北京和中国现在都非常受欢迎，尤其是奥运会要召开了。