In short, the key to doing well in any EFL paper is this :
read books by authors such as Lee Child, Tom Clancy and David Baldacci.
read magazines such as the Times.
read any British newspaper such the Daily Mail (I think you can get torrents of their free online versions).
The point is that you will only do well if you have a vast vocabulary and well, structured yet complex sentences.
Good Luck. Do some past papers and get them marked by your teacher and
concentrate on the Language Analysis in Paper 2.PS: Paper 3 is the easiest of the two EFL papers - it allows some creativity. Your teacher is crack