Brother it is very simple, just note down what Ayat and Ahadeeth you need to memorize for different topics. Then Read them in Arabic, their translation in Urdu/English and their Tafseer etc bit by bit daily. This way, not only you will miraculously be able to quote these in your paper, very soon you will come to know that you also have acquired a very fine knowledge of Islam. You will come to know you can answer unseen questions confidently, and many Ayats can be quoted for multiple topics in different contexts.

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"What is an ocean, but a multitude of drops" - David Mitchell