Accept that your native language level is higher than your English level, and that's ok. Focus on the language you already have. This is a simple idea, but it can be hard to put into practice.
Speaking Test Strategies
In the G.B.C. exam, using advanced grammar and sophisticated logic will improve your score significantly. In this post, you'll learn a really simple trick using the relation between two tenses. With it, you can create longer and more complex answers.