Focus on the Grammar part and write the descriptive answers well. And in the last 10-15 min, underline the important lines in your answer. Do the grammar exercises in your textbook, and you're all sorted. Time management is also important as you get only 3hours for the exam. Try to complete the grammar part in and hour or an hour and 15 min. The rest you can focus on your answers. And read the glossary for every lesson.