You should say:
who this person is
when and where you first met them
what kind of person they are
and explain why you think this person is intelligent.
考官参考范文：
Ok right then, well the person that I’d like to talk about is one of my university coursemates called Nick, because he’s honestly one of the smartest people I know. And we’ve been friends ever since I started university, because I found myself sitting next to him in our first lecture, and we (kind of) just got talking.
As for what kind of person he is, well um, I guess the best way to describe him would be sociable and likeable, coz I mean, although he’s a super smart guy, he’s not arrogant in the slightest, and he gets on well with pretty much everyone in my year.
Anyway, moving onto why I think he’s intelligent, well first of all, he always does really well in all our exams, you know, like coming top or second in most of them. And what’s amazing is that he doesn’t seem to study (all) that hard, but still manages to do so well. For example, as well as studying, he’s also got a part-time job, which I’m sure must take up quite a bit of his time. So it ‘s really impressive how he’s able to do this without it affecting his studies whatsoever.
And another thing is that whenever the lecturer asks a question, he always knows the answer, and sometimes he’ll just whisper it to me because he feels a bit embarrassed to answer every time!
So yeah, I’d say he’s a really clever guy, and I feel very lucky to have such a good friend.
高分表达Notes:
I found myself – 我不知不觉的
he’s not arrogant in the slightest – 他一点都不自大
pretty much everyone = 差不多所有人
he doesn’t seem to study that hard, but still manages to do so well – 他好像不是那么用功学习的，但还是能做得很好。
So it ‘s really impressive – here, “impressive” means 了不起
…without it affecting his studies whatsoever. – 一点都不影响他的学习。
(At university, we often say “lecturer” instead of “teacher”)
That’s about it then = 大概就这些
I’d say = I think
He’s always been able to help me whenever I’ve had any difficulties with my studies.
