mysql query

I have a language learning site. And there I have a vocabulary exercise. In my database I have a table called words. It has three fields. id, english and turkish. In that exercise I have to select from both columns the single words for example :

id english turkish
1 book kitap
1 student ogrenci
1 school okul
2 book kitap
2 boy erkek
2 propose onermek
3 suggest onermek
3 book ayırmak


Then, the output that I want is

book kitap
student ogrenci
school okul
boy erkek
propose onermek

So that I can match these in my exercise.How can I write it in mysql?
Thanks for help.
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re: mysql query

Can you explain on which rule you want to include or exclude the words? A simple solution would be the use of GROUP BY e.g.

re: mysql query

No this is not . Because from turkish there are two "onermek" field. However I have to get one of them. A sample solution is the following but mysql does not support intersect. How can I write it in mysql? Thanks.

select english,max(turkish) from st
group by english

intersect

select max(english),turkish from st
group by turkish