**Rule:** In a future time clause beginning with 'as soon as', the Simple Present Tense is used to refer to the future action. The main clause uses a modal ('we can get'). Using 'will' in the time clause is a common error. Option (d) 'has arrived' is also possible to emphasize completion, but simple present is the most common form.

**Rule:** The Future Perfect Continuous Tense (will have been + verb-ing) is used to emphasize the duration ('for three years') of an action leading up to its completion in the future ('by the time he finishes it'). It focuses on the long, continuous creative process.

**Rule:** The Future Perfect Tense (will have + past participle) is used to express that an action will be completed before another future event. The action of clearing the leaves will be finished by the time the festival starts. Option (a) implies the action will be in progress.

**Rule:** The Future Perfect Continuous Tense (will have been + verb-ing) is used to emphasize the duration ('for six months') of an activity up to a specific point in the future ('by the time the new tenants move in'). It focuses on the length of the renovation project.

**Rule:** This is a First Conditional sentence ('if' + simple present, ... 'will' + base verb) warning of a likely future consequence. The main clause correctly uses 'will miss' to state the result of not hurrying. Option (b) is for hypothetical situations. Options (a) and (c) are incorrect.

**Rule:** The Present Continuous Tense ('is/are' + verb-ing) is often used for official plans and arrangements that have been announced for the future. It implies a firm plan. 'is going to increase' would also be correct. Option (c) is also possible but present continuous is very common for announced plans.

**Rule:** This sentence contains a future time clause ('until all the students have left'). The main clause must be in a future tense to describe the action. 'will not leave' correctly states the teacher's intention or the expected sequence of events. The time clause correctly uses the present perfect ('have left') to emphasize completion.

**Rule:** The Simple Future with 'will' is used for a spontaneous decision. Upon tasting the cake, the speaker immediately decides they want the recipe. It is not a prior plan. Option (d) would imply they had already intended to ask for the recipe before tasting it. Options (a) and (c) are incorrect.

**Rule:** The 'be going to' future is used to make a prediction based on a present trend or evidence. 'The way the company is losing money' is the current trend that leads to the logical prediction of bankruptcy. Option (a) is a more general prediction, less tied to the immediate evidence.

**Rule:** This is a First Conditional sentence ('if' + simple present, ... 'will' + base verb). It is used for real and possible future situations. The main clause describes the likely future result if the condition is met. 'will land' is the correct form for this future result. Option (c) is for hypothetical situations.