What's the best way?
just learn of the key sentences and word of the essay and then the bits to finish the sentence. then you would be able to know your essay
1. Learn the common structure and phrases used.
2. Learn about 10 to 15 specific words related to the topic you are studying.
3. Practice writing answers to questions on that topic.
Make a list of possible topic for opinion pieces that could come up, Eg. the refugee crisis, terrorism, climate change...