Here are some suggestions for study materials to help you prepare for the Hi-Lingua Language Contest:

Official Past Papers of the Contest: Obtain previous years' question papers to understand the exam pattern, types of questions, and level of difficulty.

Grammar Books:
Brush up on your grammar skills with comprehensive grammar books that cover various language rules and usage.

Vocabulary Books:
Enhance your vocabulary by using vocabulary-building books, flashcards, or apps. A rich vocabulary is crucial for language contests.

Reading Comprehension Guides:
Use guides or books that focus on improving reading comprehension skills, understanding various writing styles, and interpreting passages.

Writing Guides:
Explore books that provide insights into different writing styles, essay structures, and tips for effective and persuasive writing.

Language Workbooks:
Utilize workbooks that offer exercises and practice problems in areas like sentence structure, syntax, idiomatic expressions, and more.

Language Reference Books:
Have language reference books, including dictionaries and thesauruses, to aid in understanding word meanings, synonyms, antonyms, and proper usage.

Online Language Learning Platforms: Use online platforms like Duolingo, Babbel, or Memrise for interactive language learning, which can help in enhancing your language skills.

Practice Tests and Mock Exams:
Take practice tests and mock exams to simulate the actual exam experience, and time management, and to gauge your progress.

Language Apps:
Explore language learning apps like Rosetta Stone, QuizUp, or WordUp, which often have quizzes, games, and challenges related to the language you're preparing for.

Tutoring or Language Classes:
Consider enrolling in language classes or seeking tutoring from experienced educators who can guide you and provide personalized study plans.