By Prepositions, Before and After

Hi there, What preposition should I use with festivals, during, in or at? Does 'at Christmas' refer to the day of 25th December? Does 'during Christmas' refer to the days before and after the 25th? Can I use 'in' to replace 'during'? If I want to refer to the days of 24, 25, 26th December,...

The idiom is to have to (do something). It means that the action described by the final infinitive must be done within the amount of time allotted. The students had one hour to complete the exam. We have three months to install the kitchen cabinets. Martha and Sam have only...

I was distracted by the fact that the cannot be written without the spaces before and after the z without creating an icon. I had to edit the post to correct this. By that point in time I was getting frustrated, and my parallelism detector got messed up. Either in or of would have been...