1. . Don't come to my room tomorrow I __ to my exam the whole evening. will be preparing will have prepared will prepare am preparing

The correct answer is "will be preparing."The sentence "Don't come to my room tomorrow I __ to my exam the whole evening." is talking about an ongoing action that will take place in the future. The correct tense to use in this case is the future continuous tense, which is formed with "will be" + present participle (verb-ing).So, the correct answer is "will be preparing," which means that the speaker will be in the process of preparing for the exam the whole evening tomorrow.