首先我想说清楚的是：如果考官要求你讨论一个并不熟悉的话题，不要担心，可以直接说这个话题你没有思考过，然后尽量从不同的角度思考这个话题--原因，影响，可能的解决方案是什么等等。雅思考试测试的不是你的知识面，而是沟通能力。考试不一定评估你的表达内容(但必须与问题相关)，而是评估你的表述方式。

如果你不知道说什么，你可以说：

"Well, I don't really know much about... because..., but I suppose..."

换句话说，你得先承认你确实对这个东西不太清楚。你要解释一下你为什么不清楚，然后编一个答案。你看一下下面的例子：

1.诚实的向考官解释你不知道

1)What kinds of jobs might stop when the season changes?

Well, I don't really know much about seasonal jobs because everyone works all year round where I live,but I suppose that some jobs related to tourism must stop at the end of the summer holiday period.

2)Some people choose to have a guide when they go to an unfamiliar place.Do you think this improves the quality of the experience?

I have not travelled anywhere so I do not have any experience of a guide.I think it will be useful as guides generally have more knowledge of a specific area,and the special places within that region.But I have heard that sometimes guides can take vistors to specific shops or hotels that they can earn money from.This can create a negative experience of a place so you have to find reliable people to be a guide.

2.猜，告诉考官你在猜

How has technology affected the kinds of music that young people listen to?

(1) To be honest I don't really know the answer to that because I'm completely out of touch with what young people are listening to, and I'm not a fan of pop music.

(2)However,I suppose that technology must have affected music.Maybe young people are listening to music that has been made using computer software instead of real musical instruments like the piano or guitar.