Check the instructions first to make sure that they are what you expected from looking at the specimen paper. Misreading instructions can lose more marks than poor revision!
OpenLearn - Revision and examinations Except for third party materials and otherwise, this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence, full copyright detail can be found in the acknowledgements section. Please see full copyright statement for details.