Papers should be summaries of the reading in which you cite the most essential arguments and evaluate their strengths and weaknesses. Were they compelling or informative? Dissect the reading, cite particular page numbers and demonstrate that you read the work carefully and understood it.
All applicants go through a series of tests that check their level of English and knowledge of formatting styles. The applicant is also required to present a sample of writing to the Evaluation Department. If you wish to find out more about the procedure, check out the whole process.