You will be checked on your fundamentals of English like your knowledge of English Grammar, Comprehension, etc. The topics you might have to study would be Grammar and Usage, Error Findind, Synonyms and Antonyms Word Pairing, Comprehension, Vocabulary, One word substitutions and Fill ups. Read articles from time to time. Follow newspapers, magazines, and watch the news channels and browse the internet to keep yourself updated. You will need a lot of reading to help you in the comprehension section. You will need speed to help you in this section and you can achieve that only by thorough practise and reading. Take time to understand the question because most answers are interlinked. These books should help you:

• Word Power Made Easy (by Norman Lewis)
  This is the go-to book to improve your vocabulary. It is not a book to be read but a book to work with daily to enrich your vocabulary.
  
  High School Grammar and Composition( by Wren and Martin)
  It is a very good book for people who want to improve their grammar skills. It helps to understand and conceptualise different aspects of grammar and it is a must have book for anyone with poor grasp on verbal ability or who wants to make up with the basics of English.