Choose the right option. The film was _______ boring to watch so we decided to leave the cinema early.

The correct answer is 'too'. Here's why: * Too means 'more than enough' or 'excessively'. It fits the sentence because it explains why the film was so bad that they left early. * Enough means 'sufficient'. It doesn't fit because the sentence implies the film was overly boring, not just sufficiently boring. * Rather means 'somewhat' or 'to a certain extent'. While it could be used, 'too' is a stronger and more appropriate choice. * So means 'to such a great extent'. While grammatically possible, it's less common in this context and would usually be followed by 'that'. Therefore, the correct sentence is: 'The film was too boring to watch, so we decided to leave the cinema early.' Answer: too