How to improve the vocabulary I use on essays for proficiency level?

in 20 days I am going to take exam for the proficiency certificate of English language. the problem is that in my writings i use very simple and of lower level worlds which make my essay inappropriate for passing this exam. what should i do? thank you

do what you can..using big words that you don't really know or use would make your essay artificial.

Learn up about 10 new words a day.Then, try making sentences out of these words.Also keep using these words while you are speaking.Reading does help but since you have only 20 days,learning new vocabs and using them as often as you can seems like the best way.

thank you very much... :) I'll do my best

Well, at the time I am typing this, you still have about 10 days to prepare.

If you read a newspaper and pull out a sentence, you can practice many variations of it.

Here is an example of a sentence you can work with:
Children are not scrutinized as much as adults.
Students are scrutinized if they have bad reputations.
Children are not working as much as adults.

Find a good sentence in a book you like. Use 1 sentence each day! Change a few words to make a new sentence. Play with one sentence each day, and you will write very well when you take the test!

:-)