**Rule:** The Future Continuous Tense (will be + verb-ing) can be used to explain why you cannot do something in the future. It refers to an action or state that will be in progress and is part of your existing plans. It's a polite way of stating a prior arrangement. Option (b) is also possible but less common in this specific explanatory context.

**Rule:** The negative Future Perfect Tense (will not have + past participle) is used to state that an action will not be completed by a specific future deadline. The speaker is predicting that the arrival will not be a completed action by 'tomorrow morning'. Option (d) describes an action that won't be in progress.

**Rule:** The Future Continuous Tense (will be + verb-ing) is used to say that an action will be in progress at a specific time in the future. The time '10 o'clock tomorrow' is when the meeting will be happening. Option (b) means the meeting will be over by 10. Option (a) is incorrect. Option (d) is grammatically incorrect.

**Rule:** 'Shall' is used with 'I' and 'we' in interrogative sentences to make an offer or a suggestion, or to ask for advice. 'Shall I close the window?' is a classic example of offering to do something. Option (a) 'Will' would be used to ask for a prediction (e.g., Will I feel warmer?), not to make an offer. Options (b) and (c) are incorrect.

**Rule:** The Future Continuous Tense (will be + verb-ing) is used to describe an action that will be in progress at a specific time in the future. At 3 PM, the meeting will be ongoing. This is a common way to explain why one is unavailable. Option (a) 'will have' is a simple future statement but less specific about the ongoing nature of the event. Option (c) 'have' is simple present. Option (d) 'will have had' (Future Perfect) implies the meeting will be over by 3 PM, which contradicts the sentence's meaning.

**Rule:** The Future Perfect Passive voice (will have been + past participle) is required. The 'report' is the object of the action. The action of finalizing will be completed by a specific future deadline ('by the end of the fiscal year'). Option (c) is active voice. Options (a) and (d) are incorrect.

**Rule:** 'Shall' is used with 'I' and 'we' in questions to make an offer or suggestion. 'Shall I get it?' is a polite offer to answer the phone. Option (a) 'Will' is used for predictions or decisions, not typically for offers in this form. Options (b) and (c) are grammatically incorrect for this purpose.

**Rule:** The Future Perfect Tense (will have + past participle) is used to express an action that will be completed before another event in the future. The speaker predicts that the action of starting the film will be finished before they arrive. Option (a) is a simple prediction. Option (b) implies the film will be in the process of starting when they arrive. Option (c) is for scheduled times, but here the focus is on completion before arrival.

**Rule:** The Future Perfect Tense (will have + past participle) is used to warn that an action will be completed before another future event happens. The warning is that the movie's start will be a completed event before their arrival if they are late. Option (c) would mean it's in the process of starting, which is less of a warning about missing the beginning.

**Rule:** 'Be going to' is used for predictions based on present evidence. The fact that the car is 'old' and needs service is the evidence that it is likely to break down. This is a logical conclusion from the current state of the car. Option (c) is future perfect. Options (a) and (d) are incorrect.